Hi, I have this peculiar problem in my 2 yr old laptop. Configuration is- Model-Compaq Presario 1532, CPU-P4 2.4MHz(not HT), RAM-512M, HDD-30GB, etc. OS-WinXP SP2. No overclocking. Problem- Whenever the CPU is fully stressed out to 100% for more than 15 seconds (as seen from taskmanager > performance tab), the laptop shuts down automatically as if I had clicked Start>Turn off computer...>Turn off. (No hard drive check when rebooted.) Happens whenever the following are run- 1) Game - Age of Empires 2 2) Game - Quake 3 Arena 3) Game - Heroes of Might & Magic 3 4) ACDSee 6.0 - When batch converting a directory containing lots of graphics which takes a lot of time. 5) PSP7 - Same as for ACDSee. When I use applications which do not hog the CPU, e.g. MS Word, Excel, internet browsing, etc, there is no problem. My first suspicion is the CPU itself. It may not be getting cooled enough. But then, the CPU fan seems to be working fine - the fan is working and hot air is coming out as usual. I was wondering if there was a mechanism whereby if the CPU is hotter than allowed the laptop is shutdown automatically by the OS or BIOS. It could be that the air ducts are clogged a bit and it is not cooling the CPU enough. (btw, i have not tinkered with the original settings) In this case I would like to open up the laptop & check for any air vent clogging. (I am a bit far from the nearest authorised servicing center and the guarantee/warranty has expired). But before I take such drastic action I would like some suggestions. (BTW, I have been using/assembling/upgrading desktop computers for my use at home since the days of 80486DX. The laptop is the first branded PC I have bought so far and I am itching to peek into its innards ). Thanks.