When I start my computer, windows starts up and displays initial screen, but then shuts itself down and then restarts, and so on. When start in safe mode, windows still shuts itself down. So I tried start in safe mode and did "return to last good configuration" but end result is same. I checked "save debug in ntbtlog" but how do I see it if windows won't start? Don't have a windows xp cd or windows xp setup cd but could get one if knew where. Also don't want to erase hard drive if possible. Help? Thanks.