RESTATING MY PROBLEM:
I bought a new PC (the only components I used from my older PC are: Graphics Card, DVD Drive and Hard Drive) so what I bought new is: Motherboard, CPU, RAM Power Supply and Case.
After my friend helped me building up my new PC, I started to experience RANDOM REBOOTING.
I handled my PC to where I bought it from for several times.
Firstly they changed my RAM (same specs... just new ones) , next my motherboard (from P5QC to P5P43TD) and my Power Supply.
I still experienced RANDOM REBOOTING... so I rehandled my PC, however this time they said that they ran some stress tests and everything semmed to be normal!
I formatted my PC for several times (always installing Windows 7 Ultimate 32-bit)
still RANDOM REBOOTING!
4 months after the day I built my PC I came to this forum:
I was suggested to check the EVENT VIEWER... I found a critical error:
Code:
-System
-Provider[ Name] Microsoft-Windows-Kernel-Power[ Guid] {331C3B3A-2005-44C2-AC5E-77220C37D6B4}
EventID41Version2Level1Task63Opcode0Keywords0x8000000000000002-TimeCreated[ SystemTime] 2010-04-07T18:22:42.346813700Z
EventRecordID21380Correlation-Execution[ ProcessID] 4[ ThreadID] 8
ChannelSystemComputerSEAN-Security[ UserID] S-1-5-18
-EventData
BugcheckCode0BugcheckParameter10x0BugcheckParameter20x0BugcheckParameter30x0BugcheckParameter40x0SleepInProgressfalsePowerButtonTimestamp0
After that someone suggested to remove the AUTO RESTART option because everything has a zero value, and by removing that setting we could identify the problem because a blue screen should splash when encoutering the error.
I did untick that setting... however I experienced other RANDOM REBOOTS and no BLUE SCREEN splashed.
Next I was suggested to run a RAM test and Hard Drive test. I couldn't figure out how to do the RAM test and I did half of the Hard Drive test: No Errors
Later I was suggested to use the
Windows Memory Diagnostic tool : Again - No Errors!
I still have the RANDOM REBOOTING problem though
That's basically everything...
If anyone needs more info for identifying the problem pls let me know.
I would like to thank everyone who helped so far and those who will help in the future! 