I've had a recurring problem on my desktop. At seemingly random times, it simply freezes. I cannot move my mouse, I can't summon the task manager, the screen stays lit up but I cannot do anything at all, save force a restart. It doesn't matter what program I am using, or if I'm even using the PC at all (I can leave it alone, and come back to a freeze). Also, if sound happens to be playing, it sometimes hangs on the last note (typically makes a constant buzzing sound as a result).
I've had this happen for months, and it hasn't gotten worse. It happened under windows 7 64 Pro, and now under windows 8 (don't laugh). I've also completely reformatted the HD at least once in that time, so I suspect it is a hardware related issue.
The GPU has also been changed since, as has the PSU. So the only components that are still the original ones are the hard drive, motherboard, CPU, and RAM chips.
Intel i3-2100 CPU, 3.10GHz
Hitachi HD721010CLA332 Hard Drive
AMD Radeon HD 7800 GPU
XFX Core Edition PRO550W
Can anyone give some advice on where to look? My amateur guess is to suspect the hard drive, but just about any tech would know more than me...
Thanks for any help.