Don't know because don't know what's wrong with it.
If it's a faulty hard drive then probably not, if it just needs windows reinstalled then probably not (unless they really make the effort to do so)
If the current install can be repaired then yes they can but only if they are able to login to the system (ie they would need his password)
that said, unless their is anything he needs to be worried about on the laptop don't worry about it, believe me when I say people that repair computers will have seen it all before.