system
27
Why not just uninstall Avast from Add/Remove Programs?
Than download and run the complete Avast Uninstall Utility Here: (Follow the instructions exactly.)
http://www.avast.com/en-us/uninstall-utility
Than get a fresh download of Avast at www.avast.com
Register for your license key.
It sounds like a complete removal and reinstall of the product might be needed as previous options for fixing Avast have not worked.
Jack