Hi I have had a base unit with Vista business pro on and am having problems.
When i switch it on it logs on fine, and can do anything for about 3-4 mins and then a quick blue screen, and crash. It dosent reboot but I have to leave it 5 mins before Ican restart it. and the same thing happens.....
The BSOD is not on long enough to see the problem listing.
If it reboots after 5 mins then it could be overheating. Have you opened the case to check the cpu cooling fins for clogged up dust and general dust covering. I use a painter's brush and hold a vacuum cleaner nozzle close to remove any disturbed dust. Usual precautions to be used.
As above and check your GPU's fan. Just be careful how you sweep these fans/cooling fins and general area within the PC. Once removed of dust then put the side panel back on and see what happens after you boot up.