Posted 09 October 2011 - 03:18 PM
I solved the problem myself, or at least with the help of a lot of other posts and some common sense.
I rebooted in safe mode and ran rkill and combofix again. After that I was able to uninstall Avast completely via the control panel. Then I downloaded Avast and brought the computer back up in regular mode, when it let me reinstall Avast I knew that I was finally free of Guard Online.
This latest version of guard online is particularly nasty and it took a lot of work, probably eight hours worth to get it off the machine. In the end I had to manually disable it by pulling a few things out of the registry. Then run rkill,rkproxy, FixNCR, and malwarebytes to get my machine cleaned off.