I too f up my sp2. The upgrade was successful, however it experienced sudden reboots once in a while. Last week, just 2 days before I go on vacation, the computer reboots before it reaches login menu. Safe mode has the same behavior. I think I will not loose much data because my c drive is windows only and has nothing else.
My friend has similar problem with his laptop when he upgrade to sp2. However, when he freshly reinstall XP SP2 (the sp2 iso, not upgrade from sp1), all the problem goes away. I might do the same thing when I get back home after my vacation. The question now is should I reinstall xp sp2 or Media Center Edition 2005.
