system hang while gaming, aparently bsod

I have a problem, when I play some games my system sometimes just hangs. I keep seeing the same image on the screen(the last frame my pc showed). Then I have to reset my pc. when my pc starts back up I get this message: Windows has recovered from an unexpected shutdown. and it shows this info:

Problem signature:
Problem Event Name: BlueScreen
OS Version: 6.1.7600.2.0.0.256.1
Locale ID: 1043

Additional information about the problem:
BCCode: 124
BCP1: 0000000000000000
BCP2: FFFFFA8004B9D038
BCP3: 0000000000000000
BCP4: 0000000000000000
OS Version: 6_1_7600
Service Pack: 0_0
Product: 256_1

I'd like to know what it means and if there is anything I can do about it.
PS I never see the bleuscreen, just the last frame from before it hung.

 

I've had the BSOD many times, and for numerous different reasons. first have you installed any new software, or games, or hardware? If you have maybe try to do a system restore, and see what happens. Have you defragmented lately? What games are you playing? And what are the system requirements for the games you are playing?