Hi,

Then we need to reinstall avast! from scratch.

  1. Download the latest version of avast! Uninstall Utility and save it.
    You can download it from http://files.avast.com/files/eng/aswclear.exe
  2. Download the latest avast! version that you have purchased and save it.
  3. Uninstall avast from Control Panel. Reboot after that.
  4. Run the avast! Uninstall Utility saved on 1. Reboot after you run it.
  5. Install avast! using the setup saved on 2. Boot.
  6. Check the status and post back with the results.