So, I installed SP2 today, hoping to solve my network problem, and everything just...fell apart. I couldn't see my windows, backgrounds; my system idle process was 99 throughout the time I was on XP (even after numerous restarts). Anyway, I did a system restore (I felt blind, guessing where certain buttons were) and things became semi-normal. My system-idle process is still really high, but it seems to be running ok. What could have caused this? Is it just because my hard-drive is pretty cluttered and numerous changes have been done to my system?