I then suggest an Avast uninstall and clean install:
- Save a copy of Avast for the product you need and save it to your HDD (if not already done): http://www.avast.com/download-software
- Download the Avast Uninstall Utility http://files.avast.com/files/eng/aswclear6.exe and save it to your HDD.
- Disconnect from the Internet at this time.
- Go to Control Panel and uninstall Avast through Add/Remove Programs if possible and reboot.
- If Step 4 fails, boot into Safe Mode (hit F8 repeatedly) and run the Avast Uninstall Tool. Uninstall ALL previous versions and products of Avast one at a time and reboot in between.
- Reboot.
- Install the newest version of Avast and reboot.
- Get Internet access and register your copy or add the license key for Free, Pro, or AIS.
- Update the Avast definitions and reset your settings.
Let us know if this fixes your problem. Thank you.