hi guys, my pc has been constantly getting blue screen from random moments. I've tried programs that will max out processor usage but from 15hrs test no problem, same goes for RAM, where I ran another 15hrs for it and not a single error.

But then sometimes on random moments, like opening another window, playing games half way, or trying to open a folder, blue screen will pop out suddenly. I'm unable to pin point which hardware is facing problem til now.

my only idea so far is that my USB is having some problem. It seems that the ports sometimes will just die all together, need to reset pc then it will go back to normal. It dies on random times, can die the moement pc starts, can be 5mins after turning on pc, can be 5hrs later... or can work perfectly for days. I've attached around 16 logs dated from 14oct (since i thought I kena virus so I formatted my pc on that day) I've got other random restarts by itself, sadly there are no logs for it

Here are the logs
http://www.megaupload.com/?d=DTN9MTXP

My pc hardwares are
Intel® Core™ i7 CPU 860 @ 2.80GHz
Asus P7P55D Mobo
NVIDIA GeForce GTX 275
2GB x 2 RAM
2 HDD, im not sure about rpm but its 1 black and 1 green from WD
PSU : Silverstone ST56F 560w

I'm looking for a pc shop that offers to troubleshoot n fix the problem, i'll be more than happy if anyone can recommend me one because I have a problem of carrying it around the mall (like lowyat) to the shop, too heavy prefer if its a shophouse.

please assist.. thanks