system
6
OK. It could be an old version which is the trouble or the program installer.
Download a fresh Avast! installer.
http://files.avast.com/iavs5x/avast_free_antivirus_setup.exe
Then run again aswclear for Avast1 versions 6, 7, and 8 in that order. Do not reboot until all versions have been run and then reboot. Install Avast!