BSOD after automatic shutdown due to overheating processor

What happened ?

Was rendering a videoclip, processor got too hot and computer shut off. After rebooting I got this :

In my first attemp to repair this problem I encountered the problem discribed in

https://www.sevenforums.com/backup-restore/274204-enable-system-protection-local-disk-c-cmd.html
I do have a few restore points, but no system image
This seems to be fixed, but still couldn't boot.
I tried the bootrec commands, chksdk's RAMtest : all OK

So : this is where I am now when I do a "normal" boot:

STOP c000021a Fatal System Error (BSOD)
--------------------------------
Verification of a knownDLL failed. system process terminated unexpected with a status of 0x000012F
(0x009831a0 0x00000000)
System has been shut down.
[REM] after a while :beeping mobo > same sound as overheating processor (maybe processor very busy ?)

Boot with bootdisk.
-------------------
- Advanced Boot Options
Safe Mode.
System Recovery options
Select keyboard
Choose OS : Windows 7 Ultimate (recovered), 57138MB, (C:)Local disk
RESTART COMPUTER TO COMPLETE REPAIRS
Finish (to restart immediatly)

Boot from HD
------------
STOP c000021a Fatal System Error
Verification of a knownDLL failed. system process terminated unexpected with a status of 0x000012F
(0x00f18f20 0x00000000)
System has been shut down.
[REM] beeping mobo > same sound as overheating processor

Boot with bootdisk.
-------------------
- Advanced Boot Options
System Recovery options
Select keyboard
Choose OS : Windows 7 Ultimate (recovered), 57138MB, (D:)Local disk
Startup Repair cannot repair this computer automaticly
System Restore
chose for last restore point.
chose Programs (E:) and Local Disk (C:)
SYSTEM RESTORE DID NOT COMPLETE SUCCESFULLY
details : failed while scanning file system on drive D:\
drive might be corrupt...
error during system Restore (0x80070057)
(same problem with other restore points)

goto http://answers.microsoft.com/en-us/windows/forum/windows_7-system/system-restore-error-
0x80070057/0b8c7c81-3fe9-4d43-8369-1a41a5756171

> Boot from CD, goto DOS prompt typed : sfc /scannow
a system repair pending....
> EXIT

Never had any heat problems while doing all these tests (exept on BSOD), so most likely processor =OK
What now ?

ps : thanks in advance !

OK.
Last Know Good Configuration gives me

STOP c000021a Fatal System Error (BSOD)
--------------------------------
Verification of a knownDLL failed. system process terminated unexpected with a status of 0x000012F
(0x00712100 0x00000000)
System has been shut down.

I restarted the computer normally (from HD) and did the startup repair. I got the message : Windows cannot repair this computer automatically.
I went through the "Diagnosis and repair details and everything seemed to be OK (all error codes 0x0). At the end I read:

Root cause found :
---------------------
Unspecified changes to system configuration might have caused the problem

Might this be a hint to get my computer back on the road again (without having to reinstall windows and all programs)?

thanks in advance !

I went further and tried system restore.
After a while I got the message :

rstrui.exe - Application error

The instruction at 0xfc0eca53 referenced memory at 0x0dd8ff94.
The memory could not be read
Click on OK to terminate program

My next step will be Windows Memory Diagnostic.

Memory test done, computer rebooted and gives me a BSOD :

PAGE_FAULT_IN_NONPAGED_AREA

bla bla bla

STOP 0x00000050

etc ...

If you've confirmed CPU overheating then first use these Cleaning Tips / Removing Dustbunnies (NCIX Tech Tips #13) and How to Remove and Apply Thermal Compound [Updated Tutorial] - YouTube

Then work though these steps for Troubleshooting Windows 7 Failure to Start.

Hmmm ... memory doesn't seem to be OK.
Downloaded and now running Memtest86 v4.20...

Thanks, Gregrocker, but I cleaned (vacuumed) the processor and all fans just two weeks ago, and the computer is NOT in a dusty enviroment (eg : no carpets on floor...)
I do know how to vacuum PC's. (eg : prevent fans from spinning while vacuuming etc ...)
Nevertheless thanks ! I'm running a memtest now ...