If your copy of windows is genuine just follow the link. MS website will see that it is a licensed copy and stop bugging you.
If it is a pirate copy the MS website will see that and I believe you could then get a blank screen. This is to stop piracy and, I believe, will not involve a prosecution.
If anyone has a pirate copy, nobody is in a position to complain about the pop-up. It is afterall 'free' sfotware you have.