SiobhanSee :
I ran a complete diagnostic on the hardware systems yesterday twice, for several hours and it did not shutdown once. I went back in to the OS and immediately it did the shutdown thing. I went into safe mode and worked on some other fixes I read on the internet. Again it stayed on for hours. I even tried some fixes in DOS ran fine. I have no other software on it other than the operating system, so I can't see a conflict there. Still every time I boot up It shuts down.
Can this really be a motherboard issue? I just don"t get it. My understanding of the MB must be lacking. I will look into it more.
In the meantime do you think there are some software patches? I have SP 1,2 and 3 loaded.
Thanks every one for your help.
This info helps, also the fact that you actually get a blue screen crash instead of it just shutting down or rebooting.
Did you try using different RAM?
The only issue is that you have a clean setup of Windows and you did hardware tests which also look to have done well. I'd be leaning towards a hardware issue, RAM would be the first thing to test, it's the easiest and cheapest to replace. If your motherboard was failing, especially the video card, it can lead to crashes when the drivers were all loaded.