Are you still having the problem? If you are, you might want to first try an Avast Repair:
XP Users:

  • Go to Control Panel > Add/Remove programs > Avast Antivirus.
  • Scroll down and choose Repair function in the pop-up window.
  • Reboot.

Vista & Win7 Users:

  • Control Panel
  • Programs & Features
  • Uninstall a Program > Select Avast Antivirus
  • Click the Change/Remove button and scroll down to Repair
  • Click Next and follow.
  • Reboot.

If the Repair does not fix your problem, follow the suggestion given to you by Tech already to uninstall and do a clean install of 6.0.1125.