From time to time freezes your PC, what specific event before this will not be done.
Reinstalled Windows, the situation is again repeated where to find the pain?
After 2-3 minutes hang
The first in what may be the problem is the power supply
Then overheating
Then remove it to stick the other glands in the queue (could be the RAM is filled to the bat IC, CDM hangs on a bit sector)
Download Aida64 there, in the top menu there is a simple stress test with graphs of temperature and other things
To check memory, disk, power, and temperature.
Diverite memory errors. Check that there are no circuit motherboard on the case, check the capacitors.
To change and test turns - power supply, hard drive, memory, Mat. Board, the processor.
If it freezes the computer, but the cursor operates, then falls off the wire to the hard disk, or the disk is damaged. If there are stripes on the screen - falling off the wire to the percent/the motherboard (although it did not seem to hang, just reboot)