That's unfortunate and I'm unsure if you've re-installed AVG or not.
I wouldn't recommend re-installing it with your current infection as it's questionable whether or not you'd get a clean installation.
I would rather you ran the AVG cleanup utility found on this site =>
http://www.avg.com/download-tools
Note from AVG: AVG Remover utility removes all parts of AVG installation on your computer, including registry items, installation and user files on your disk, etc. AVG Remover is the east option to be used in case the AVG uninstallation / repair installation process has failed repeatedly. Warning: All AVG user settings will be removed after the uninstallation, as well as the Virus Vault content and other item related to AVG installation and use. During the removal procedure you will be asked to restart your computer. Therefore please make sure to finish your work and to save all important data prior to AVG Remover launch.
Once you've finished cleaning up AVG, go ahead and run ComboFix per my prior instructions. You can re-install AVG after running ComboFix.
Post back with the information I requested in my first post when you're finished, please.
Good Luck
