Another Blue Screen! Please help!

I changed my old PS-2 Keyboard to a new A4TECH PS-2 one , and i was playing an online game for about 40 minutes , running Windows Media Player 11, And i got this blue screen all of a sudden:
A problem has been detected and windows has been shut down to prevent damage to your computer.
Watchdog.sys

PAGE_FAULT_IN_NONPAGED-AREA

if this is the first time you've seen this stop error screen, restart your computer, if this screen appears again, follow these steps:

Check to make sure any new hardware or software is properly installed. if this is a new installation ask your hardware software manufacturer for any windows updates you might need.

If problems continue, disable or remove any newly installed hardware or software. Disable BIOS memory options such as caching or shadowing.

If you need to use Safe Mode to remove or disable components, restart your computer, press F8 to select Advanced Startup options, and then select Safe Mode.
Technical information
***STOP: 0X00000050(0XDDA49BD3,0X00000000,0X89B811B0,0X00000002)
*** Watchdog.sys- Address 89B811B0 base at 89B80000, DateStamp 4a5bc21a
Collecting data for crash dump...
initializing disk for crash dump...
beginning dump of physical memory.
Dumping physical memory to disk: 100
physical memory dump complete.
Contact your system admin or technical support group for further assistance.
Is this related to Graphics issue? Graphics driver or card, But am updating my HD 4350 driver to the latest version.

Any help please?
Thanks

Could you Please upload your Dump Files

see http://www.vistax64.com/crashes-debugging/279837-how-upload-dmp-files-vista-forums-analysis.html For more Details

This Could give us more information to help with your problem, Also I am no expert but I think watchdog.sys has or is related to moving pagefile.sys into a wrong area

Many Thanks,
Josh

Here is the dmb file which is in the minidumb folder