This random reboot doesnt always happen during burning DVDs, it has happen 2-3 times when i have actually been on the pc in the middle of other stuff.

I had updated all my drivers for the graphics card and the mothreboard chipset aswell.

I tried running chkdsk, but when i rebooted the PC, it froze in the boot up sequence when the Windows logo is on the screen and the bar below is running from left to right. I have down a defrag also and also gave the pc a clean inside removing dust etc from fans.

I did leave the PC on last night and had a BSOD error this morning which said BAD_POOL_CALLER. And the only hardware i have installed recently is the new graphics card, then this rebooting seem to start shortly after.

Thnx

Razor