I’ve tried to completely delete avast! - I also used the tool, which you can download, but there are still Files left in the registry Is there a chance to delete avast! “completely” from the system??
Read his other topic he has an unresolved problem with vista not recognising avast is present and what has been suggested to get vista to recognise it has failed, though avast works vista keeps saying it isn’t there http://forum.avast.com/index.php?topic=26564.0