He's just bought a custom-built PC from C1 Shoppingmall (www.c1com.co.nz) and specs are as follows:
500GB Seagate HDD
2x2GB G-Skill DDR2-800 RAM
2.66GHz Wolfdale Core 2 Duo
8800gt 512mb Graphics
Vista Premium 64-bit
When he starts it, it will go to his desktop, everything will run fine, then suddenly nothing can be clicked, and soon the cursor also freezes. No chance to Ctrl+Alt+Dlt or bring up task manager. This freeze was initially happening after about 30 seconds, but after taking out one stick of RAM it lasts as long as 5 minutes before freezing (may be coincidence). This started happening before we changed any settings, the PC is still as new.
I have tried taking out the RAM and putting back in, leaving one stick out as mentioned above, and having a look at the BIOS on startup (didn't really know what to look for though). I've emailed C1 about it, hopefully he won't have to ship the PC back to Auckland, as from Dunedin to Auckland the overweight charge will be brutal. Made sure everything is plugged into PSU, everything looks right, I'm truly at a loss as to why this is happening.
Oh, and freeze doesn't happen in Safe Mode, which leads me to believe it's nothing to do with hardware and is related to Vista or drivers?