After the restore I should have said run aswclear as Avast does not play well with system restore. My apologies
Download Uninstall Utility to your Desktop.
Download the correct version of Avast
Avast Free
Avast Pro
Avast Internet Security
Avast Premier
Disconnect from the net
Uninstall Avast via control panel
[]Run aswClear
[]It will offer to reboot to safe mode
https://dl.dropbox.com/u/73555776/aswclear.JPG
[*]In the Select Product to Uninstall dropdown choose the version of Avast that is on your system.
[*]Press Uninstall
[*]Once complete reboot your system to Normal Mode
[*]Reinstall Avast