Interpreting error signatures…

Anyone know of a tool to interpret error signatures?? I have client whose PC suddenly reboots and when it comes back up he gets the following error signature:

BCCode : 7f BCP1 : 00000000 BCP2 : 00000000 BCP3 : 00000000 BCP4 : 00000000 OSVer : 5_1_2600 SP : 0_0 Product : 256_1