Update: The system just crashed again.
After couple days of normal usage (email, web browsing and regular gaming). The system just crashed today without any cause. The screen simply froze and the sound just went buzzing in a continuous matter. Mouse cursor movement and keyboard input is futile. The only way to use the PC again is to hard shutdown (hold down the power button until it turns off).
I've checked the System Event log and found no Bugcheck error, the only log indicating is the "Unexpected Shutdown" error and "Kernel-Power" Critical error.
I have several programs running during the crash, listed as follows.
- Google Chrome
- HWMonitor (all the temperature parameters were normal though)
- Windows Live Messenger
- Media Player Classic
And some background programs, listed as follows.
- Kaspersky Anti-Virus 2010
I have performed Chkdsk to scan for bad sectors, but none were found. I also ran Memtest86+ to check whether the RAM is bad or not, but after several passes, no errors were found.
EDIT: Also tried Long Drive Self Test on SeaTools, no errors as well.
Any useful suggestions would be appreciated.