Sometimes it´s not possible to uninstall avast! the standard way
using the ADD/REMOVE PROGRAMS in control panel.
In this case, you can use our uninstallation utility aswClear
How to uninstall our software using aswClear.exe:
Download aswClear.exe on to your desktop
Start Windows in Safe Mode
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!)