I wouldn’t understand why self defence wouldn’t disable, have you rebooted the PC?

If that works, download:

Avastclear : http://files.avast.com/iavs9x/avastclear.exe

If that doesn’t work, try to run avastclear in normal mode…

If that fails… run this in normal mode:

Rejzors Uninstall tool: https://skydrive.live.com/?cid=94a12102e5094675&id=94A12102E5094675!952&authkey=!AHu_KR3cJN1jHt4