New facilities of the latest FF browser automatically uninstall when I restart

I have been using browser FF on my Toshiba laptop that runs Windows 7 years and worked great. I've recently updated to the latest version http://www.mozilla.org/en-US/ a few days ago and it worked fine (for a day). He put icon on the desktop and in my taskbar, just like I asked during the implementation. But whenever I restart my computer, browser disappears completely - just totally missing desktop icon - missing files in the programs folder - be uninstall and disappears like she never existed. I downloaded and installed 3 times and the same thing happened every time. I'm running AVG Anti-virus software, but did not any changes for him during this time.

It is possible that your anti-virus or your firewall can do this. Try to disable it and install Firefox and restart to see if the problem still persists.

Tags: Firefox

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