I think it is heat related but not sure if it is or what to do. My computer specs are:
AMD Athlon 64 X2 Dual Core Processor 5000+, 2599 Mhz
2,00GB RAM
32-bit
Graphics: ATI Radeon HD 4800, 1GB
and I have a 120mm fan in my power supply of 480W.
When I play and kind of game, my computer's temperature goes up only in 10 minutes like this:
CPU: 40C > 46C
GPU: 41C > 52C
AUX: 56C > 74C
HDO: 45C > 47C
Core: 33C > 68C
I think my problem is related to overheat, but can there be any other explanation for this?

I tried resetting my computer completely back to its factory defaults in order to get rid of viruses. I tried to cool my system unit down by taking off the covers, speeding up my fan, cleaning the dust every 2 hours, doing nothing, but none of these worked.