When I re-configured my laptop recently, a few days after, I started getting a little pop-up that said I had a certain number of days to activate windows... so I clicked on it numerous times and it said "you have already activated windows, clik ok to exit" ... so I did. The same pop-ups kept happening, and I kept trying, but always the same prompt. So I guess time has expired to activate windows (even though it always said that I already did) and now I cant log in! When I turn on my computer it tries to log on but then It says I must activate my windows before logging on, but then it says I am already activated. Then I try to log on and it repeats the same message. Sorry for the novel guys, but Im desperate to fix this problem! I have windows xp. Any advice will help!