this copy of windows is not genuine

I have been using this installation for TEN MONTHS. I activated SUCCESSFULLY immediately after installation. Why is it only now, after 10 months, that windows tells me it is not genuine?

And why was my original thread closed?

If it is genuine, just contact Microsoft and they WILL verify it. No problem, I assure you. It may not work by Internet, it sometimes takes a phone call.

BUT, if there's any mess about legality, torrents and such tend to end by age.

Thanks for the response. Before I could attempt any of that, the message has disappeared by itself. I wonder if Windows is in the background constantly contacting a Microsoft server to "verify" its genuineness, and there was a problem with the server? In any case the message is gone now.
I purchased the Windows disks from a reputable seller, along with the hardware for a system I was building, so as far as I new it was a genuine version. I contacted the seller, and they were quite surprised, and suggested similar actions as you.

End is well, all is well. Glad it got solved.

EDIT: For future need, http://www.sevenforums.com/windows-u...ctivation.html

... hope no one needs it, ever...