BSOD when starting up

[tehsparrow]

Hi !
My friend recently built me a computer but sometimes when I start it up I get BSOD and my computer restarts once or twice and then it is fine again, im using windows 7.

Problem signature:
Problem Event Name: BlueScreen
OS Version: 6.1.7600.2.0.0.256.48
Locale ID: 1033

Additional information about the problem:
BCCode: 7f
BCP1: 00000000
BCP2: 00000000
BCP3: 00000000
BCP4: 00000000
OS Version: 6_1_7600
Service Pack: 0_0
Product: 256_1


any help would be appreciated, thanks so much!

 

[EDO219]

hm ... have you over-clocked it?