Hello I couldn’t update Avast free with new virus base so I tried to uninstal - it didn’t allow me either.
Windows 7 /16 bit please advise
Olga
Download and save a new copy of the latest avast first then Read and follow the instructions here to uninstall avast http://www.avast.com/uninstall-utility once completed and rebooted back to normal mode install your new copy of avast.