at one point a poll i saw across numerous media sites suggested 95% of those who went SP2 had reformatted and only installed SP1 again, with a good software firewall like Sygate in place.
i've taken a gamble this time, not putting SP2 on, but allowing a lot of critical updates onto my machine, luckily my windows hasn't collapsed yet.
anyone finding their windows has died wants to remove all programs they dont need, codecs, then defragment their registry and see if that helps out, unlikely though