Computer shutting down after few minutes

Hi,
I have a computer thats currently off (Im on the laptop) and that computer is shutting down after few minutes of being up, I thought that it was the heat, so I was doing/did this; -I opened a computer and left it that way so it could "chill" and not get overheated because its under the table and its kind of a box, -If it ever turned off I would remove the CPU fan and put it on the window for about 10-15 minutes for it to be cold and then it would work. Im here because that, isnt working anymore (the window thing) so I need some help.

Here are the computer specs and all that.

CPU = Intel Pentium 4, 2.76 (3) GHz
RAM [Socket No.1] = CORSAIR CMX512 - 3200C2, XMS3202 v 5.2, 512MB 400 MHz CL2> "Golden" nodes perfectly fine except they are a little dark-ish.
RAM [Socket No.2] = JetRam J12D3ATL - 5L T0627M, 512MB DDR 400 3-3-3> 2 Golden nodes are burned and 1 is particially burned.
RAM [Socket No.3] = Empty
RAM [Socket No.4] = Kingston KTC - PR266/1G 2.5V, Alot of sh+t and then the Assy in China.> Golden nodes perfectly fine.
(For more information contact me)

My opinions are;
- The "JetRam" is causing the problem because of the burned parts.
- The power managment box (Idk the real name of it) cant power everything so it shuts down.
- The CPU is overheating because the CPU fan doesnt go on when computer does so I need to use a special program called SpeedFan to power it on, either way same thing happens > Computer shuts down
- Virus :$ ?

Please help as fast as you can, thanks!