My son has a Dell Inspiron 5150 laptop. He has had it for about 1.5 years, and it is used every day in college. In the last few weeks, it has started shutting down, like it is going to a sleep mode. The drive spins down, and the screen goes off. It can not be "woke up". You have to hold the power button down for about 5-6 seconds, then you hear the drive spin down and it shuts down. Then you can turn it back on a try again. There is no clue as to when it happens, Sometimes it is on for half a day, sometimes it does this before it ever boots completely up, or anywhere in between. I have run AdAware, and that doesn't help. Any ideas at all?? I hate to have to reload the program and he loses everything on the computer. Thanks for any help.