wierd blue screen

[windy1]

Just took my 4 yr old W2K desktop out of standby. heard the hard disk start motoring then a clunk, followed by a blue screen with the following 3 lines:
xxxSTOP: 0x000000D1(ox0FF85F8, OxOOOOOOOZ, OxOOOOOOOO, OxOFFF85F8)
DRIVER_IRQL_NOT_LESS_OR_EQUAL
BEGINNING DUMP OF PHYSICAL MEMORY
There it hung. Did a restart and its working OK. Any ideas? Which bit is about to break?
(O might be 0 ( zero) - couldn't really tell)

[hobie]

there is some heavy stuff in the links pointed to below but some reading may guide you in the right direction ....

try this Google and have a look through a few of the links ....

http://www.google.ie/search?hl=en&q=DRIVER_IRQL_NOT_LESS_OR_EQUAL&meta=