First check connections are ok,
Check speakers aren't muted by clicking on speaker icon on bottom right of task bar.
failing that check speakers are set as default device,
go to control panel/sound/select "playback tab"/
right click"speakers high definition audio device"
/set as default device/apply.
also check in device manager drivers are ok.,
Problem signature:
Problem Event Name: BlueScreen
OS Version: 6.1.7601.2.1.0.768.3
Locale ID: 1033
Additional information about the problem:
BCCode: 3b
BCP1: 00000000C0000005
BCP2: FFFFF960000E7170
BCP3: FFFFF880078D5DB0
BCP4: 0000000000000000
OS Version: 6_1_7601
Service Pack: 1_0
Product: 768_1