error signiture after a crash

my notebook crashes very frequently recently.
The error signiture I just got is:

BCCode : 1000000a BCP1 : 81001F27 BCP2 : 0000001C BCP3 : 00000001
BCP4 : 804E33C6 OSVer : 5_1_2600 SP : 2_0 Product : 256_1

I wonder if any of you experts know what is wrong with my laptop.

Thanks.