Hi.

I have a 1.4Ghz Pentium 4 with 512mb of RAM computer running Win XP Home Edition.

The computer can not stay on longer that two hours (literally) before it crashes.  Why does it crash so much?

If you need more specs on the computer post what you need to know.

Thanks!Download, unzip, install and run Everest Home Edition
Everest
Let the computer run for half an hour then...
Select Computer>Sensor from the left hand screen.
Right click in the right hand screen & select Copy All
Paste the details in here.Field      Value
Sensor Properties      
Sensor Type      ITE IT8705F  (ISA 290h)
Motherboard Name      ECS P4VMM2 / P4VXA / P4VXM SERIES
      
Temperatures      
Motherboard      31 °C  (88 °F)
CPU      35 °C  (95 °F)
      
Cooling Fans      
CPU      5114 RPM
POWER Supply      2824 RPM
      
Voltage Values      
CPU Core      1.73 V
+2.5 V      2.51 V
+3.3 V      3.28 V
+5 V      5.08 V
+12 V      12.03 V
+5 V Standby      1.45 V
VBAT Battery      2.03 V
Debug Info F      84 FF EF
Debug Info T      35 31 201
Debug Info V      6C 9D CD BD BC 40 48 (01)

There you go!

Computer has been on a half hour alreadyThat was quick LOL!
When it crashes what does it do or not do?
Your temps are ok.I'll be doing something and the screen just goes black.  It doesn't do anything unusual I NEVER know when it will crash.

But there are things that DO make it crash...these are:

Playing games
Watching videos online, large flash animations/videos
Sometimes when listening to music'

Basically the computer sucks overall  You can't do anything that makes it work.  And it shouldn't be overloading the processor with these little things.Try updating your video drivers.They are updated.  Everything is updated.What is the computer make and model? How about the power supply and wattage? How old is it?The computer is 5 years old, but it has been crashing since 2.

It's a V2 Premier. A brand they sell on ShopNBC.

Power Wattage..no clueThat seems a reasonable PLACE to start. And then a format and reinstal of Windows, after backing up your data, especially if that is the ORIGINAL load.