Need help to kill the nasty Firefox virus / adware

One of the computers in my office has a nasty Firefox virus / adware. Only Firefox is affected, Chrome and IE agree. Get lots of pop-up ads even if pop-up blocking is enabled. Many pictures of non-standard advertising appear on most web pages. Hyperlinks show more pop ups advertising when you hover over some of them. Performance of Firefox is very slow. When I use 'Copy link location' on links and pop-ups, they each have a base URL different - too many to try to block via firewall or virus software. Anti-virus AVG, Malwarebytes scan, AdwCleaner, HitmanPro all come clean. All the Firefox plugins and extensions are disabled. Firefox reset does not solve it. Uninstall/reinstall of Firefox is. CCleaner ran on the files and the registry. None of the suspicious programs appear in the Panel. Ran antivirus, CCleaner, Malwarebytes, AdwCleaner, once again, all in safe mode. No joy.

Any ideas?

Thank you

Rob

Occasionally, malware can change settings in the Firefox program files. To address this problem:

Clean reinstall it

We use this name, but it is not about the deletion of your settings, this is to ensure that program files are clean. As described below, this process does not disrupt your existing settings. Don't uninstall NOT Firefox, that does not need.

(1) download a fresh Installer for Firefox 37.0 of https://www.mozilla.org/firefox/all/ in an ideal location. (Scroll down your preferred language).

(2) close Firefox (if applicable).

(3) to rename the program folder

(Windows 64-bit folder names)

C:\Program Files (x86)\Mozilla Firefox

TO

C:\Program Files (x86)\OldFirefox

(Windows 32-bit folder names)

C:\Program Files\Mozilla Firefox

TO

C:\Program Files\OldFirefox

(4) run the installer you downloaded in the #1. It should automatically connect to your existing settings.

Any difference?

Note: Some plugins can only exist in this OldFirefox file. If it is missing something essential, present in these files:

  • \OldFirefox\Plugins
  • \OldFirefox\browser\plugins

Tags: Firefox

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