Driver power state failure on shut down

Ok nearing wits end with this. I have posted to the Lenovo support forums and didn't receive a reply. I have been having a problem with my Lenovo G550 with blue screens on shut down. Every so often when I shut down, it just stays on the "Shutting down" screen, then after about 15 minutes or so, it will give a blue screen saying that a "Driver Power State failure" had occurred.

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: 9f

BCP1: 00000003

BCP2: 8757A028

BCP3: 83345AE0

BCP4: 88010AF0

OS Version: 6_1_7601

Service Pack: 1_0

Product: 768_1

Files that help describe the problem:

C:\Windows\Minidump\042812-16910-01.dmp

C:\Users\MacLeod\AppData\Local\Temp\WER-46628-0.sysdata.xml

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C:\windows\system32\en-US\erofflps.txt

I did save the .dmp file, but the sysdata.xml file since it's a temp file, has already been cleared. I don't know how to attach the .dmp file on here.

I have used the Lenovo system update and ran their memory tester, but it's still something is not working.

And the blue screen only happens on shut down.

Help!!

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