I recently had a PC, where I purchased and used a Windows 10 Pro product Key. For some reason that computer stopped working and I returned it and got a refund. Basically, I'm hoping they wipe out the whole computer data and stuff, but they asked for my login password because they needed to fix the issue by checking out various programs installed on my computer. I had no private information on that computer, or anything, and I deactivated my gmail and steam through another account. My only concern is, can you deactivate a windows 10 login using another computer?