What you are asking us to do is help you crack passwords and hack into someone's protected computer and/or copy their protected data! Sorry but that's not going to happen! We have no way of knowing if you are a fence or not, or if this friend is a drug addict with a stolen PC trying to get some quick cash for their next fix! That's for our protection, the site's protection, the PC's real owner's protection, and for your protection too.
What needs to happen is your friend needs to take the computer
and the Windows license to a legitimate shop where they can verify that copy of Windows is legal and the PC does not appear to be stolen.
Also note that you risk your own status here by violating
D-A-L Rules and Terms of Service which you agreed to comply with when joining. Note Rule 11d states you can be banned for the following unacceptable behavior (my
bold underline added), Please understand that virtually every technical support site has the same policy. We have to err on the side of security and safety, even if it imposes an inconvenience for a few. I hope you understand.