Blue Screen Error, What does it mean??

[IFICUDIWUD]

Fatal exception " OD" at 04FE0000083B
What does it mean?? Everything boots and posts normal.. 1 beep bios sees all, I get all the way to the screen just befor my deskto loads and then get this error... Your help as always is greatly appreciated

 

[Ming]

it could be your memory
otherwise try to reinstall OS