system
5
If your friend or client didn’t click on the Avast button located in the “Maintenance” section of Avast Then You would have had to download the 'Avast 5 Uninstall Utillity Tool" … then you would install Avast 6…Do a search with Windows Explorer “Start” “Search” Just to see…Also which windows are you running? XP Vista Windows 7… Also What other Security software is installed on the computer besides Zone Alarm? Also check for any other Antivirus that comes to your mind and do a search for them also…Example…Norton usually comes pre installed on most computers…so does Security Essentials…If You find any other Antivirus…Download that version of Uninstall utillity tool from their website…
By your description so far it sounds like there is leftovers of another Antivirus or Firewall with antivirus that hasn’t been uninstalled properly…Luck… and update us on any changes