Tim:
You should say whether you're wanting to keep that Windows installation (which could be a problem in itself, as it's registered to someone else, using their details, and you may need to keep supplying those details over time), ...
Dave Ihnat:
Actually, not. Microsoft doesn't care about the owner of the Windows license; it's tied to the hardware by registration. The only MS link to the former owner would be if he/she was stupid enough to create their account as an online account, and you can get around that by creating a local account.
Not that I have a great deal to do with Microsoft products, their use and abuse thereof, anymore, but I was sure that when my friend fairly recently registered his Windows installation, there were some names, numbers, and/or addresses, involved.