Please learn to use sentances, paragraphs and full stops.
What make and model of laptop is it and what is the Operating System, XP home or Pro SP2 or SP3, Vista, W7?
Does your friend have any Restore, Recovery or Op Sys CD/DVD's? If so then try a repair.
Does it have a 'restore to factory settings' feature? If it does then I would be inclined to use it as it would seem that the registry is really messed up.
I hope your friend is appreciative of your efforts and help and will take more notice of your warnings to have sufficient anti-virus protection in the future.