[SOLVED] Windows 7 crashing (error details inside)

Hi,
Windows 7 is occasionally crashing on me,
here is the error code it is giving me,

"
Problem signature:
Problem Event Name: BlueScreen
OS Version: 6.1.7601.2.1.0.768.3
Locale ID: 2057

Additional information about the problem:
BCCode: 9f
BCP1: 0000000000000003
BCP2: FFFFFA8010A7B060
BCP3: FFFFF80004B243D8
BCP4: FFFFFA8013180B80
OS Version: 6_1_7601
Service Pack: 1_0
Product: 768_1

Files that help describe the problem:
C:\Windows\Minidump\082013-9921-01.dmp
C:\Users\Donal\AppData\Local\Temp\WER-526986-0.sysdata.xml
"
Any help or solutions from the computer gods here would be much appreciated

thanks