I used system restore to back to old Windows 7 prior to updates. Now, about 3 weeks or so, I installed some updates to windows 7 and it made Windows 7 so unstable (BSOD every few mins after I boot/restart it). I activated it once and it never appeared again. I built my system last year and I bought official DVD rom of Windows 7 Ultimate 64 bits and install it (as upgrade to release candidate build 7600). It kept asking me to activate it every 10 mins (or thereabout) even though I never add new one nor make any change to my hardware/system, in last 2 weeks. I have got problem (annoying one) with Windows 7 activation.
