One of my PCs was infected with the KoobFace virus/worm. Now, after removing it, I am unable to access the internet.
Here are the specifics on my system and the steps I've gone through so far.
PC: Acer Netbook
Operating System: Windows XP Home, SP3
Browser: Firefox v3.6.3
Security Software: Avast Free 5.0.545. Malwarebytes 1.46
At time of infection, was running AVG, however, when I realized that AVG apparently doesn't have a boot-time scan, I uninstalled it and installed Avast.
- Ran Avast Boot-time Scan
- Ran Avast Full Scan
- Ran Malwarebytes scan - KoobFace detected and removed
- Ran CC Cleaner
- Ran MV RegClean - Program removed a number of Koobface entries from the registry.
When I try to access any website, I get the error "The Connection was Reset". However, I am able to access Gmail, and it appears I can access anything running a secure (https) server with no problem.
I can ping google, yahoo, etc. with no problem - just can't access them via a browser. It's not a problem with my network, my other PCs can access the Internet fine. Problem is isolated to just the infected laptop.
Thinking that perhaps this was an issue with Firefox, downloaded Chrome from another machine and installed it with the same result.
Checked my Hosts file and verified that there were no issues.
Scratching my head at this point - any help would be greatly appreciated.