How to Remove Websearch.goodforsearch.info Totally?

Websearch.goodforsearch.info was invented to attack internet browsers. As soon as the redirect virus infects the browser, it will change the browser settings without your consent. With all the modifications of the browser settings, you will find the default homepage replaced by Websearch.goodforsearch.info. When you use its search engine, the redirect virus could take the chance to confuse you, redirecting you to the websites it promotes. As a result, you are not able to access its favorite web pages and you are forced to visit the websites that you don’t want.

The redirect virus will show you specific advertising sites which are not well-known and this is the way it generates traffic of the website. The hijacker can fool you and take advantage of your personal information to make profits. As most ads sites provided by the redirect virus are always so tempting that you may click those banners or headline and then fall victim to the trap. The so-call preferential information are not reliable, you should not click those ads to avoid getting defrauded.

What you should do is remove Websearch.goodforsearch.info virus from the system. Most users consider the hijacker is just a harmless domain, so they take it for granted that as long as they don’t click on those ads links or poop-ups of Websearch.goodforsearch.info they won’t meet any trouble. However, things are not that simple. The redirect virus will get through the security lines of your computer and mess up your system. It makes unauthorized modifications that makes whole security system vulnerable to unwanted Waldemar and virus. With plenty of malicious viruses occupying the system resources, the computer performance will be significantly dragged down. The situation will get worse, it you don’t take any measures to stop it. The best solution is to remove Websearch.goodforsearch.info virus immediately and then restore the system settings in a timely manner.

How to Delete Websearch.goodforsearch.info Hijacker Completely

1. Stop running processes related to this redirect virus

a: When the Windows Task manager appears, switch to Processes tab.

b: Find out and select the processes related to the virus by name random.exe, and click on the “End process” button.

2. Remove the redirect virus from Internet Explorer:

a: Start IE, go to Tools and select Internet Options.

b: Find General section, remove the redirect virus address as a home page.

c: Then go to Search section, find Settings button and choose Manage Add-ons

d: Erase the redirect and after the action, close Manage Add-ons

3. Remove the redirect virus from Mozilla Firefox:

a: Open Mozilla Firefox browser, click on tools and go to Options.

b: Switch to General tab, remove the redirect virus address as a startup site.

c: Then, go to: Firefox -> Add-ons -> Add-ons Manager -> Remove.

d: In the Search list, select Manage Search Engines and erase this redirect and choose OK

4. Remove the redirect virus from Google Chrome:

a: Open Google Chrome and navigate to Settings tab and Set pages.

b: Delete the redirect virus which was set as the startup site and choose OK

c: Find Manage search engines and here, erase this redirect.

d: Press on OK, and restart Google Chrome.

5. Delete all registry files created by this redirect

a. While the Registry Editor is opened, search for the registry key “HKEY_LOCAL_MACHINE\Software\ Websearch.goodforsearch.info.” Right-click this registry key and select “Delete.”

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run “[RANDOM].exe”

b. Navigate to directory %PROGRAM_FILES%\ Websearch.goodforsearch.info \ and delete the infected files manually.

%AppData%Local[random].exe

C:\Documents and Settings\LocalService\Local Settings\Temporary Internet Files\*.exe

C:\Documents and Settings\LocalService\Local Settings\

Conclusion

Deleting Websearch.goodforsearch.info is not easy for most users infected with it. Generally speaking, users won’t realize the danger until things getting quite serious. Evil caber criminals designed this virus to take advantage of the unwariness of the users to make profits. Run system scan regularly to detect any cunning infections and try the best to find any exception happened in the computer so as to find the better solution to solve problems caused by malicious virus. As unwanted virus usually came from the third-party software, freeware and shareware in particular, once users download them, they will cause system crash. Moreover, users should scan the system to detect the whole system in a professional way to protect the computer from infections. If you would like to try another way to get rid of Websearch.goodforsearch.info, please download a professional redirect virus remover, it will be helpful in removing the troublesome redirect virus.

How to Remove Www-search.info/?src=us Completely?

Www-search.info/?src=us is a type of redirect virus that attacks users’ computers and furtively modifies the browser current settings, causing the changes of the default homepage. Besides, this redirect virus will take over users’ default search engine without any consent. This redirect virus has a seemingly legitimate interface which misleads most users into thinking that it is a useful website providing the search function as Google does, and some users really use the unsafe search engine to do a search, and as a result, they are constantly redirected to some suspicious websites.

In fact, it is a fake search engine that pretends to be a legitimate site and provides users with multiple utilities and many other search services in order to attract users to visit it. The threat not only hijacks the browsers, but also delivers constant pop-up ads on the target computer screen, especially when users launch some third-party applications, so as to attract users to click on those ads and have a visit. Commonly, browser hijackers are designed to increase web traffic and promote products or services to make money. It comes bundled with additional parasites to mess up your computer terribly, which is to generate traffic and obtain profits from per-click-paid techniques through clicking on this site or other malicious websites. As a consequence, most users are not aware of the potential dangers of this redirect and keep viewing the advertising sites.

Www-search.info/?src=us is capable of changing your default browser silently but it is difficult to change it back. Once infected, it shows up numerous unwanted pop-up ads, fake alerts and sponsored links on your PC screen to interrupt you when you are online. However, users might find out that their PC performance slow down because the Www-search.info/?src=us redirect virus consumes lots of system resources. Sometimes, users even encounter browser crash or computer system crash. Anyway, it is suggested to take thorough action to remove Www-search.info/?src=us redirect virus from your computer as soon as possible.

Effective Steps to Remove Www-search.info/?src=us Redirect

Step one: Delete all the cookies related to the redirect virus from browsers.

Internet Explorer: Select Tools -> Safety -> Delete browsing history, click Delete button to delete all the cookies.

Mozilla Firefox: Select Tools -> Options -> Privacy -> Remove individual cookies -> Show Cookies->Remove All Cookies.

Google Chrome: Select Wrench Icon -> Options -> Under the Hood->Clear Browsing Data to delete all the cookies.

Step two: Wipe out add-ons and extensions relevant to the redirect virus.

Internet Explorer: Click on Tools > Manage Add-ons.

Mozilla Firefox: Click on Tools > Add-ons (Ctrl+Shift+A).

Google Chrome: Click on Wrench Icon > Tools > Extensions.

Step three: Get rid of the registry entries associated with the redirect virus.

Open Registry Editor by pressing Windows + R keys and typing regedit into the Run box. As soon as Registry Editor opens, search for the registry entries associated with the redirect virus and get rid of them quickly as listed below:

Step four: Erase the following files created by this redirect virus.

%Profile%\Local Settings\Temp\

%ProgramFiles%\

%UserProfile%\

Step five: Don’t forget to reboot your computer to save all changes.

Conclusion

Www-search.info/?src=us redirect Virus is a high-risk program kept in some packages of software, performing like a useful item free to choose but actually setting a trap for users. This unwanted application can be also bundled with free downloads from the Internet and automatically installed on the PC silently without letting users know. Most computer users don’t realize that their computers have been infected with malware even if they see some weird symptoms when browsing the Internet.

Manual removal of Www-search.info/?src=us redirect virus is so daunting that you may want to give up halfway during the process. If it is the case, the best solution is to remove the redirect virus using a powerful removal tool. Ensure a complete deletion of Www-search.info/?src=us redirect virus, the safest and best way is to get a professional removal tool on your computer. In addition, scan each downloaded file before running it on computer for security, in case of the virus or rogue software mix together with others and invade system and post threaten to computer. 

Remove Security-essentials.info – How to Delete Security-essentials.info?

Security-essentials.info is a redirect virus designed to infect users’ browsers and controls their browsing direction. Once the computer has been compromised by this malware, the browser settings will be modified unexpectedly. After the changes take effect, users will notice that the default homepage has been changed to another one without any permission. When you use its search engine, the redirect virus could take the chance to confuse you, redirecting you to the websites it promotes. If so, computer users won’t have the ability to load the web pages for the accurate search results have been extended from the result list by Security-essentials.info.

Most of the time, the redirect virus redirects users to certain websites which contain lots of attracting or misleading advertisements. If users are taken in by the browser hijacker, cyber criminals can make use of it to make illegal profits. As most ads sites provided by the redirect virus are always so tempting that you may click those banners or headline and then fall victim to the trap. It is important to know that all information provided by Security-essentials.info is not trustworthy, and users should use extreme caution when being shown something that sounds tempting so as to avoid being deceived and encountering unnecessary losses.

It is not safe to let this redirect virus remain inside the infected computer for a long time. Most users would mistakenly think that if they do not click on the pop-up ads or sponsored links from the website Security-essentials.info, they could keep their computers safe. But that is not true. Since the redirect virus can makes some changes in the system, various problems would occur on the computer. Some changes can weaken the system’ defenses and thus additional malware would grasp the opportunity to break into the infected computer easily. With plenty of malicious viruses occupying the system resources, the computer performance will be significantly dragged down. The situation will get worse, it you don’t take any measures to stop it. Therefore, it is highly recommended that users remove Security-essentials.info redirect virus without any delay and then restore the system settings to keep the computer safe.

How to Get Rid of Security-essentials.info Completely?

Step one: Uninstall the redirect virus related programs from Control Panel.

Windows 8: Click on Start -> select Settings -> open Control Panel-> Uninstall a program, remove the programs relevant to this redirect virus.

Windows XP: Click on Start -> select Settings -> open Control Panel -> Add or Remove Programs -> Programs and Features, find out the programs relevant to this redirect virus and then click Remove.

Windows 7/Vista: Click on Start -> open Control Panel -> select Uninstall a program/ Add or Remove Programs, find out the programs relevant to this programs and click on Uninstall.

Step two: Remove add-ons and extensions related to this redirect virus from browsers.

Internet Explorer: Click Tools->Manage Add-ons->Disable the add-ons related to this redirect virus.

Mozilla Firefox: Click Tools-> Add-ons -> Extensions. Find out the extensions related to this redirect virus.

Google Chrome: Click Wrench Icon->Tools-> Extensions-> disable the extension related to this redirect virus.

Step three: Reset your homepage.

Internet Explorer: Click Tools->Internet Option->General, type your favorite website in Home page area, and then click Apply to complete the operation.

Mozilla Firefox: Click Wrench or 3-Bars icon-> Settings-> On Startup-> click Set pages, add your preferred domain and set it as your homepage.

Google Chrome:

Click Tools-> Option->General, remove this fake site from the homepage box and type your favorite domain, click OK to complete the change.

Step four: Restart your computer normally to save all changes.

  

Conclusion

The process of confronting with Security-essentials.info is a disastrous experience for most of the common computer users. Generally speaking, users won’t realize the danger until things getting quite serious. Cyber criminals always utilize redirect virus to attack computers with security holes so as to achieve the goal of making money. Thus, users should pay more attention to their computer performance and run their advanced antivirus programs to scan the PCs once some weird symptoms show up in order to prevent more damages caused by hidden viruses. As unwanted virus usually came from the third-party software, freeware and shareware in particular, once users download them, they will cause system crash. Users need to take notice of their computers’ performances and run antivirus software to scan the entire systems regularly in an effort to ensure the computer security. If you need to quickly delete Security-essentials.info, use a professional malware removal tool.

Best Way to Delete TrojanDownloader:Win32/Lacam.A - Removal Guides

TrojanDownloader:Win32/Lacam.A virus is a malicious computer threat, consisting of malicious codes. That is the reason why antivirus programs fail to detect and remove it easily. You have tried the entire of legal antivirus program on the computer to fix it but your system performance still needs to tune up immediately? Do you know something about this Trojan infection? We are going to talk about this Trojan virus and offer guide to completely remove it.

TrojanDownloader:Win32/Lacam.A:

TrojanDownloader:Win32/Lacam.A is a vicious Trojan virus that exploits the system loopholes to infect a targeted computer. It can infest your computer especially when you visit its affiliate websites and hacked legal web pages, decompress associated files and folder attachments and obtain drive- by downloads from insecure online resources. It can silently sneak into the system without user’s prior permission. To prevent this type of virus, we must be careful while opening or installing anything.

As soon as TrojanDownloader:Win32/Lacam.A silently installs itself into the system, you should be wary of the unexpected computer performance usually. This Trojan virus takes up many system resources while running in the background of the system, so you will feel a drastic slowdown in computer performance and network speed. Your computer will suffer sudden crash or blue screen of death during the process of playing games, watching movies or writing a document. It unnoticeably drops destructive malware into the system, which may totaly damage the computer system. It is a big threat to your privacy as it help inventor to access the infected computer remotely to track your confidential information including search history and habits and account login information. That is to say,the cyber criminals can steal your individual privacy furtively and make illeagal profits by using this imformation. So users should make the backup and scrutinize system regularly to make sure the safety of your PC. However, this Trojan virus cannot easily be removed by a common antivirus program. You can see what are the specific viruses on the computer, especially TrojanDownloader:Win32/Lacam.A. Although you click the delete button after the full system scan, the stubborn Trojan will come back. Accordingly, you may take the manual removal solution into account if you need to get rid of TrojanDownloader:Win32/Lacam.A.

How dangerous is the virus?

1.It enables hackers to access to your vulnerable computer silently without permission.

2. It blocks accesses to certain webpage and redirects you to dangerous commercial websites.

3. Computer keeps scrolling down whatever page you are on.

4. It helps gather the valuable data and confidential information for the hackers.

Manual Removal Instruction of TrojanDownloader:Win32/Lacam.A:

TrojanDownloader:Win32/Lacam.A can get inside the deep of the system and act like a system file. The Trojan virus not only slows down the computer performance, but also adds more other cyber infections to compromise the infected machine. What’s worse, it allows the remote hackers to access your confidential information in the background. There no reason for you to keep such dangerous virus on the compute for a long time. There is manual removal guide which can help you remove this Trojan as soon as possible.

Step one: show its related files:

1.Start button>Control Panel>Appearance>Personalization link>Folder Options.

2. Click on “View tab” in the folder options window, here, you can show all the malicious files by clicking on “Show hidden files/ folders”, and then drives under the Hidden files and folders category.

3.Finally, click “OK” at the bottom of the Folder Options window.

Step two: Remove its associated registry

1. Open Registry Editor.

Start>Run>type “regedit”>OK.

Then remove the following registry entries:

HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run\[RANDOM CHARACTERS].exe

HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run ‘Random’

HKEY_LOCAL_MACHINE\Software\Microsoft\Windows NT\CurrentVersion\Random

HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings “CertificateRevocation” =Random

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\policies\Explorer\run\Random.exe

2.Locate and Clear the malicious files:

%AllUsersProfile%\random.exe

%AppData%\Roaming\Microsoft\Windows\Templates\random.exe

%Temp%\random.exe

%AllUsersProfile%\Application Data\random

%AllUsersProfile%\Application Data\~random

%AllUsersProfile%\Application Data\.dll HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Random “.exe”

Step three: Restart your computer normally to apply all changes after you finish all the steps.

Conclusion

TrojanDownloader:Win32/Lacam.A is a tricky Trojan virus that is prowling the internet. As soon as you open insecure email attachment, decompress shared files or click unsafe links, the Trojan virus may stealthily insert into system. Some of the malware contains malcodes bundles which may seriously disrupt the system if you let them infiltrate into the computer. If you let this Trojan virus stay on your computer for a long time, you may encounter other kinds of attacks, such as adware and spyware, which will cause more problems and make your system security status worse. Your important data and confidential information like credit card details may be stolen by those threats and illegally used by unknown people. Your antivirus program may only detect the Trojan virus and keep warning the existence of this threat, but it is not able to completely delete TrojanDownloader:Win32/Lacam.A from your computer. So, the manually removing this infection will be a good way that is worth trying.

Easy Removal Guides on How to Remove Ads by Picexa

Description

Picexa is considered as a potentially unwanted program/adware, which delivers lots of ads to the infected PC. Usually, it gives you a false impression that it is a useful application that helps enhance your browsing experience. So far, this adware is found to change the browser settings, display coupons, deals and other shopping ads and increase web traffic and improve relevant websites’ rankings and so on once it gets installed on a computer.

Picexa adware can get installed on many popular web browsers such as Internet Explorer, Mozilla Firefox and Google Chrome. Then, it starts show a number of ads based on your browsing habits. Those pop up ads may include offers, deals, coupons, promotions, sponsored links, banners, etc.

By installing and using the adware program, it means that you agree to accept the third-party ads, the access for third party to your personal data like browsing history, the sites you visited, the information you typed and other sensitive information. As a result, you may see more accurate ads in images, in-search, pop-up, pop-under and in-text and other types show up when you visit any websites.

The adware may send non-personally identifiable information it collects to its advertising partners so that they can analyze the data and deliver more personalized ads to customers. However, by clicking on those ads, you may be redirected to malicious websites and tricked into buying some fake products. To avoid further damage and data loss, it is highly recommended to take measure to remove Picexa completely from your computer without delay.

How can Picexa Get into Your Computer

Picexa usually attaches itself to free applications from the Internet, such as freeware/shareware,videos, music, system utilities, peer to peer programs, etc. If you often download application/software from unreliable websites, it is easy to get infected with various viruses. For instance, during the installation process, if you do not pay attention to each step and the text descriptions, you may give the approval to install the adware together with the desired software.

Manually Remove Picexa Adware

Picexa is an aggressive and terrible adware that may cause serious PC problems. Once detected, you should get rid of Picexa promptly from your computer before further damage.

Note: Computer knowledge is necessary during the removal process. If you are a regular PC user, it is not advised to do that by yourself. It is quite risky to delete the registry entries of the adware by hand and any mistake may lead to serious consequences to the system. If the files of the adware can’t be eliminated fully, it may be able to come back over and over again. Therefore, it is highly suggested that you download and use a powerful removal tool to delete such malevolent adware safely.

Recommended solution:

If you have difficulty in manually deleting Picexa, using a powerful malware removal tool  will be a better choice for you. It can also provide real time protection to protect your PC from other threats on the computer. 

Solutions to Remove Safer Browser Adware

Always receive ads by Safer Browser when you browse the web? Don’t know how to stop those ads from popping up on your browsers? Don’t worry. Here is the manual removal guide for you to remove such adware.

Safer Browser is a potentially unwanted program which has been complained by many people. It often gives you the impression that it is a useful application that helps enhance your browsing experience. This threat is a kid of add-on that can be added to the browsers as Mozilla Firefox, Internet Explorer and Google Chrome. When in your computer, this adware will start generating various kinds of ads on your browsers, including deals, coupons, discounts, sponsored links, banners and more. What's more, some sensitive information may be recoded by this adware, which including your browsing histories, search queries, your IP address and other information related to your identification. This may lead to many troubles such as Identity threat and other frauds. What’s more, you have a high risk of getting infected by other malware when clicking on the ads by the adware, since those ads are not checked for reliability and you may be redirected to corrupted or hacked websites. It is strongly suggested to remove Safer Browser from your computer without hesitation.

How You Encounter Safer Browser Adware?

Download and installation of insecure process: Such adware programs usually come bundled with other free applications that shared on the web. If you download and install such free applications without scanning for malware, you are likely to allow the adware or other malware to get into your machine.

Visiting suspicious websites: It often attaches itself to p2p, suspicious links, pop-ups and other unprotected networks. Especial some porn or prohibited websites which you shouldn’t visit.

Opening the attachments or click on links from strange emails: Adware or potential unwanted programs can be implanted onto the emial attachments and hidden in those malicious links contained on the email contents. If you click on those links or open the email attachments, you will be attacked by adware or PUP.

Failing to update your antivirus program regularly: Those unwanted adware programs can get a chance to enter your PC if there is no antivirus software on your PC or your security software is out of date. Otherwise, many potential threats can easily slip into your computer and attack your system.

How to Uninstall the Adware Completely?

If your computer is infected by this adware, your good mood may be destroyed when those unwanted ads keep popping up on the web pages. Besides, it has the ability to keep track of your online activities and collect your personal information to obtain illegal profits. That is why we sincerely advise you to delete Safer Browser completely and promptly from your computer. Please take the steps below to accomplish the manual removal.

Please be informed that manual removal is effective to get rid of Safer Browser, but is only for advanced PC users who can handle the process, files and registry entries. To thoroughly clear the adware, you can try a professional malware removal tool like Malwarebytes or SpyHunter to get rid of the pop-up ads completely. 

How to Remove Tika-search.com Thoroughly? ( Removal Guide)

Tika-search.com is known to be a nasty browser hijacker which aims at attacking browsers, causing forcibly browser redirection and unwanted change of the homepage as soon as it finishes the settlement onto a target computer. By doing this, the browser hijacker is able to alter the home page and affect users’ browsing habits. Tika-search.com takes advantage of convincing interface and user’s carelessness to trick users into utilizing its search service, the time innocent users use it to search for information, they will be redirected to unrelated results.

Tika-search.com has the ability to block the access to some legitimate sites, such as antivirus software download centers, and redirect users to specific websites which contain thousands of advertisements and sponsored links. Besides, when uses run their media players, they would also receive all sorts of pop-up ads delivered by the redirect virus. Obviously, those ads are there to lure users’ clicks and persuade them into buying certain products or services. Some users are interested in merchandise sale promotions, discounts and coupons, for the reason that they think it can save some money by using such coupons or discounts. Besides, It is able to change you system settings and browser settings, delete essential files and disable the executable programs at random.

The misleading interface of the Tika-search.com redirect virus let many web users believe its authority and they don’t take actions to remove or even check on its safety. The threat may add certain toolbars or plug-in to the web browser so as to assist in its malicious activities. It can appear on the startup of the infected browsers and install extensions, add-ons and links on the computer, such as Internet Explorer, Mozilla Firefox and Google Chrome. Due to the entire burden the redirect causes to the browser, none of the browsers can work properly and their performance is greatly decelerated. So, if users click the links and visit those unsafe websites, they would unknowingly get other malware like Trojan horse, worms, and adware downloaded onto their computers. You have to remove Tika-search.com from your computer as soon as possible.

How to Remove Tika-search.com From Your PC Completely?

1. Stop running processes related to this redirect virus

a: When the Windows Task manager appears, switch to Processes tab.

b: Find out and select the processes related to the virus by name random.exe, and click on the “End process” button.

2. Remove the redirect virus from Internet Explorer:

a: Start IE, go to Tools and select Internet Options.

b: Find General section, remove the redirect virus address as a home page.

c: Then go to Search section, find Settings button and choose Manage Add-ons

d: Erase the redirect and after the action, close Manage Add-ons

3. Remove the redirect virus from Mozilla Firefox:

a: Open Mozilla Firefox browser, click on tools and go to Options.

b: Switch to General tab, remove the redirect virus address as a startup site.

c: Then, go to: Firefox -> Add-ons -> Add-ons Manager -> Remove.

d: In the Search list, select Manage Search Engines and erase this redirect and choose OK

4. Remove the redirect virus from Google Chrome:

a: Open Google Chrome and navigate to Settings tab and Set pages.

b: Delete the redirect virus which was set as the startup site and choose OK

c: Find Manage search engines and here, erase this redirect.

d: Press on OK, and restart Google Chrome.

5. Delete all registry files created by this redirect

a. While the Registry Editor is opened, search for the registry key “HKEY_LOCAL_MACHINE\Software\ Tika-search.com.” Right-click this registry key and select “Delete.”

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run “[RANDOM].exe”

b. Navigate to directory %PROGRAM_FILES%\ Tika-search.com \ and delete the infected files manually.

%AppData%Local[random].exe

C:\Documents and Settings\LocalService\Local Settings\Temporary Internet Files\*.exe

C:\Documents and Settings\LocalService\Local Settings\

Conclusion

Tika-search.com usually arrives on computer by being embedded in some software update packages and pretending to be a necessary optional item so that innocent users will accept its installation request. In some cases, this redirect virus would also come together with a “reputable” application, and automatically get itself installed on the computers. For the sake of your computer and personal information, it is advised to delete Tika-search.com redirect virus immediately and fully from your computer once detected.

To prevent being hijacked and redirected by the redirect virus, users should pay more attention to the browsing activities and their computer performance so that they can take instant measures to fix the browser redirect issues once they notice the default homepage is altered forcibly, the search quires are redirected or unknown toolbars appear on the browser. If their computers get infected with Tika-search.com redirect virus, they should run the installed antivirus or anti-malware programs to scan and remove the suspicious files. Then restore the browser settings manually to repair the browsers. Meanwhile, keep the antivirus programs running the background and scan every file that downloaded from the Internet before running it so as to prevent damaged caused by tricky and dangerous threats.