0x000000d1 (0x00000015, 0x00000002, 0x00000000, 0xed2bab3e)
Win2k Service pack 2 with HP psc 950xi blue screens on occasion with above message.
Fix on HP's website
if it's not still there, search for "psc 950xi" and look for "HP All-in-One Products - IRQL_Not_Less_or_Equal or Memory Dump Blue Screen Error" document
This forum
pointed me in the right direction
or you might try just renaming uhcd.sys to uhcd.bak .. then reboot :)