I didn't ask, where windows gets my name, but why. The main problem is, windows started to do this today. It didn't do that for 5 months, so why now? This is what drives me crazy. And I can't change my name, otherwise I won't be able to make purchases.
As for my e-mail, I just ignore, delete and block mails, senders which are suspicious to me or I'm not interested at all.