Avast Clear (Avast Software Uninstall Utility) can completely remove Avast when Add/Remove programs does not work properly.How to uninstall Avast using Avast Clear (Avast Software Uninstall Utility): Download aswclear.exe on your desktop Start Windows in Safe Mode (reboot, tap f8) Open (execute) the uninstall utility If you installed avast! in a different folder than the default, browse for it. (Note: Be careful! The content of any folder you choose will be deleted!) Click REMOVE Restart your computer