BUGCODE_USB_DRIVER BSOD whenever i use my usb pen drive

Hi,
I have had a blue screen problem for a while but this one has just started happening recently. It happens whenever I plug in my USB Pen Drive. A Blue Screen comes up and says something like this:

BUGCODE_USB_DRIVER

0X000000FE (0X00000005, 0X86553OEO, 0X11063104, 0X8621A840)

(And sometimes it says: usbuhci.sys)

I have upgraded to SP2, I have upgraded the BIOS, run memtest and run the power consumption caculator.

My System Specs are:
MSI PX8-Neo-V mobo
Celeron 2.6Ghz CPU
1GB DDR333 RAM
GeForce FX 5500 256Mb
80Gb Seagate HD
LG DVD-RW Drive

I have attached some minidumps. Please help!!

Hi,

This is hardware problem andt the module list is corrupt. Probably it is fauty ram or inadequate power supply. You had better report the problem to microsoft and ask why the module list is corrupted.

I looked around the Microsoft site and it's a little confusing. Can you tell me how to report this problem to microsoft and what I am actually telling them. thanks.