Manual VPS update: http://www.avast.com/download-update

I would suggest a clean install of avast!:

  1. Download latest stable version of avast!: http://forum.avast.com/index.php?topic=139606.0
  2. http://www.avast.com/uninstall-utility (note the Windows Safe Mode detail).
  3. Install avast and restart after the installation finishes.

DJBone