Windows 7: BSOD's at random....maybe usb related?

I have been dealing with very random BSOD's since 6 months after getting my computer. The computer is almost 2 years old now. It's a power-spec and Microcenter doesn't seem to have any idea what is wrong and as the BSOD cannot be reproduced in their care. Normally I can figure problems out but I'm at a loss. Any advice would be greatly appreciated. I have tried fresh reinstall, not using Daemon tools and removal of related drivers, and testing hardware including the disc drive and memory. The current OS installation is probably around a year old.

Also forgive any errors in my posting as I am a newb when it comes to forums.

Mainboard : Intel DP55WG
Chipset : Intel P55
Processor : Intel Core i7 860 @ 2800MHz
Memory : 4096MB (2 x 2048 DDR3-SDRAM )
Video Card : ATI Radeon HD 4650
Hard Disk : Western Digital WD10EADS-00L5B1 (1000GB)
DVD-Rom Drive : Toshiba-Samsung CDDVDW SH-S223B
Monitor Type : Gateway FHX2300 - 23 inches
Network Card : Intel 82578DC Gigabit Network Connection
Operating System : Windows 7 Professional 64 bit Service Pack 1 (64-bit)
DirectX : Version 11.00

This one was during SWTOR beta testing at around 3:35 P.M. Central Time.
I will say that I am noticing some slight bluring in things like destop icons and weird stuff. Also the old republic crashed to the desktop multiple times before the stop error.

These minidumps for no particular reason as far as I can tell.