BSOD on shut-down, sleep or hibernate - DRIVER_POWER_STATE_FAILURE

Oh boy could I do with some help please! I've tried updating as many drivers as I can but I'm getting nowhere.

BSOD every time I shut-down or sleep or hibernate.

Problem signature:
Problem Event Name: BlueScreen
OS Version: 6.1.7601.2.1.0.256.1
Locale ID: 2057

Additional information about the problem:
BCCode: 9f
BCP1: 00000003
BCP2: 8608D030
BCP3: 82532AE0
BCP4: 88998BE8
OS Version: 6_1_7601
Service Pack: 1_0
Product: 256_1




WhoCrashed reports that:-

On Tue 11/09/2012 12:05:11 GMT your computer crashed
crash dump file: C:\Windows\Minidump\091112-14492-01.dmp
This was probably caused by the following module: ntoskrnl.exe (nt+0xDEE9C)
Bugcheck code: 0x9F (0x3, 0xFFFFFFFF8608D030, 0xFFFFFFFF82532AE0, 0xFFFFFFFF88998BE8)
Error: DRIVER_POWER_STATE_FAILURE
file path: C:\Windows\system32\ntoskrnl.exe
product: Microsoft® Windows® Operating System
company: Microsoft Corporation
description: NT Kernel & System
Bug check description: This bug check indicates that the driver is in an inconsistent or invalid power state.
This appears to be a typical software driver bug and is not likely to be caused by a hardware problem.
The crash took place in the Windows kernel. Possibly this problem is caused by another driver which cannot be identified at this time.

Thanks for taking an interest. Try this one......

Interestingly, after a clean start up I attempted to sleep and it still crashed.

Comodo refused to uninstall, but all components are now disabled.

Oh yes! Fantastic! How do you DO that? Seriously grateful guys, thank you.

Rick