Windows 7: Blue screen when try to shutdown

Every time i try to shutdown my PC ever since yesterday it keeps giving me the blue screen. I haven't installed anything but i have kept my PC in sleep mode for a very long time.
I got this program called "WhoCrashed" that tells me the reasons of a blue screen or of a crash and these are the results.

Crash dump directory: C:\Windows\Minidump

Crash dumps are enabled on your computer.


On Fri 31-Aug-12 5:49:06 PM GMT your computer crashed
crash dump file: C:\Windows\Minidump\083112-29764-01.dmp
This was probably caused by the following module: ntoskrnl.exe (nt+0x70040)
Bugcheck code: 0xF4 (0x3, 0xFFFFFA8005824B30, 0xFFFFFA8005824E10, 0xFFFFF800035CF720)
Error: CRITICAL_OBJECT_TERMINATION
file path: C:\Windows\system32\ntoskrnl.exe
product: Microsoft® Windows® Operating System
company: Microsoft Corporation
description: NT Kernel & System
Bug check description: This indicates that a process or thread crucial to system operation has unexpectedly exited or been terminated.
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.


On Fri 31-Aug-12 5:49:06 PM GMT your computer crashed
crash dump file: C:\Windows\memory.dmp
This was probably caused by the following module: ntkrnlmp.exe (nt!KeBugCheckEx+0x0)
Bugcheck code: 0xF4 (0x3, 0xFFFFFA8005824B30, 0xFFFFFA8005824E10, 0xFFFFF800035CF720)
Error: CRITICAL_OBJECT_TERMINATION
Bug check description: This indicates that a process or thread crucial to system operation has unexpectedly exited or been terminated.
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.



I don't really know what this mean but i looked up what ntoskrnl.exe was and i found out alot of people had problems with that.
So i hope you guys can help me because a friend of mine told me you're really good.

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