Hello! I am so glad I found this place. My daughter has a new ipod Touch, and was attempting to upgrade XP SP1 to SP2 (in order to meet system requirements for the ipod touch.) Unfortunately, midway through the SP2 upgrade, the computer froze, and upon reboot, ALL of Windows XP seemed to be missing. (blue screen only. No icons, etc.) The computer (Dell Dimension 4550) kept shutting itself off every time I tried to re-boot. I was not able to start computer in safe mode, nor any other way manually. I called dell and they had me re-install service pack 1 (well, actually, it ended up being a "repair" of sp 1 in the end, using the original CD that came with the computer.) It seems attempting to download SP2 caused my SP1 system to malfunction to the point that my computer didn't recognize I had XP at all. (?) Needless to say, I am now hesitant to attempt to download SP2 again. Does anyone have any suggestions on where to go from here? It would be greatly appreciated! MBB