i have the same problem, random shut down after i turned on windows 7 after about 1 to 2 hours. I installed windows 7 three days ago on Compaq Presario V3614AU. During these 3 days, the windows restart automatically when i surfing the net after 1 to 2 hours (no heavy work, temperature seems to be ok). then it appeared a screen that ask whether i want to restart in safe mode or restart normally, then i restart normally. the windows then can function normally for the whole day.
Is it a factor of driver crashed? because there is no drivers of Compaq Presario V3614AU in Windows 7, so i install Windows Vista's driver for my laptop hardware.
Anybody here to help me, pleaaassseeeee?