My Pc suddenly shutsdown and restarts.. and some time it just shutdown, and i physcially have to press the power button to get it started.. I have installed SP2, and all hardware seems to work probaly. Can't really tell, if there anything wrong at all.. So this problem appears to a mysterium for me.. impossible to solve.. Can't think any reasonable solution.. Please anyone, help me this issue??

I have tried this: (earlier help on the same issue) Right-click on the My Computer icon, then on the pop-up menu left-click on Properties, then the Advanced tab, then Startup and Recovery, then click on the Settings button, and then find the check box labelled Automatically restart and make sure it is unchecked. When that box is checked, your PC will restart when Windows problems occur, but you will not get an error message (which is usually very helpful in finding the problem). It's a lot easier to work on the problem if you know what it is!

did the problem only occur after you installed sp2? If so there is your problem. The one thing with microsoft (apart from them being a dodgey bunch of money grabbin b*st*rds) is they are famous for getting a bit of software nearly there then isueing out to everyone and waiting for the problems to come rolling back into them so they can fix them

This problem accour before installing SP2 and 1.. have the problem ever since I installed XP pro

I am also had random reboots but my problem was simple, so try this and yours may also be simple...type in the run window SFC /scannow, I had 2 corrupt files (log files) I no longer have that problem, it may not fix yours but will not hurt to try. I also have SP2, but had the problem before that so I knew it was not sp2.

That doesn't help either.. I don't understand this problem.. I starting to annoy me very much.. Please anyone, help me out?