The usual cause: too hot a CPU. That's either hardware: check the CPU fan and apply new heat paste, or it's software (some process using you CPU up to 90 or 100%).
It could be the GPU fan also, however, but that's unlike if you do nothing expect having the desktop on the screen.
I'd start with the processes tab in Task Manager to have a look at the CPU usage. After boot, wait a few minutes for the normal startup things to be done (that's Windows Search, antivirus and such), and then with just the desktop on it should be 98% idle at least. If not, sort on that column and tell us the top 5.
I have a Packard Bell imedia S3210 with an AMD Athalon 7450 Dual Core Processor 2040ghz, 2.00gb ram on a 64 bit operating system -
Alls relatively good about the machine...however it is starting to sound like a jet plane taking off, and generally sounds like its struggling to keep up with the daily operations I am trying to perform.
I have opened up the case, given it a thorough clean, but this hasnt helped!
I even ran a speedcheck etc to check on its performance, apparently its ok!!?
I have been told by a friend I could do with a new case and power supply and a new cpu fan (the specifics I havent got a clue) All I know is i am usually on the pc throughout the day, therefore the pc is on and running pretty much everyday - I use it for work and music production.
Any help on what best to do, what components to buy etc, would be massivley appreciated (on a small budget too)