I dont know how to do last known good configuration and system restore didnt work. I tried to restore to the day before but when the computer came back on it said system restore could not restore to that day because there havent been any changes made to the system. Yes I know what I was uninstalling, I just got the Nero 9 package and I took off all the other programs that I had for audio and DVD burning since I didnt need them anymore and I took off a few games I had on here. Yes I have XP Media Edition, it came installed on my computer when I bought it so I dont have a disk.