Sorry to say but Avast! antivirus is contributing in your BSOD-s.
Code:
Start Menu\Programs\avast! Free Antivirus Public:Start Menu\Programs\avast! Free Antivirus Public
Code:
fffff880`087aa9b8 fffff880`040b5595Unable to load image \SystemRoot\System32\Drivers\aswSnx.SYS, Win32 error 0n2
*** WARNING: Unable to verify timestamp for aswSnx.SYS
*** ERROR: Module load completed but symbols could not be loaded for aswSnx.SYS
aswSnx+0x3595
-----------------
fffff880`095d0a30 fffff880`019bf0c8Unable to load image \SystemRoot\System32\Drivers\aswSnx.SYS, Win32 error 0n2
*** WARNING: Unable to verify timestamp for aswSnx.SYS
*** ERROR: Module load completed but symbols could not be loaded for aswSnx.SYS
aswSnx+0xd90c8
Recommended antivirus program for Windows 7 based on stability compared to others:-
:warn: Do not start the free trial of Malware Bytes; remember to deselect that option when prompted.
Run a full scan with both (separately) once downloaded, installed and updated.
Code:
fffff880`0a8d2b78 fffff880`1327fa75Unable to load image \SystemRoot\system32\DRIVERS\nvlddmkm.sys, Win32 error 0n2
*** WARNING: Unable to verify timestamp for nvlddmkm.sys
*** ERROR: Module load completed but symbols could not be loaded for nvlddmkm.sys
nvlddmkm+0x240a75
The latest drivers for NVIDIA are a little problematic as I've heard. Click on the Start

rb: ► Control Panel ► Programs ► Uninstall a program ► Uninstall everything related to; NVIDIA
Reboot the system. Now delete remnants of its drivers using
Driver Fusion/Sweeper.
Reboot if required
Download and install the drivers from the link of Filehippo bellow:
Free up the start-up, nothing except the antivirus is usually needed.
Run the System File Checker that scans the of all protected
Windows 7 system files and replaces incorrect corrupted, changed/modified, or damaged versions with the correct versions if possible:
Run Disk Check on your hard disk for file system errors and bad sectors on it:
Please uninstall Spybot S&D, it;s sometimes known to corrupt and slow down the system.
Code:
Start Menu\Programs\Spybot - Search & Destroy Public:Start Menu\Programs\Spybot - Search & Destroy Public
Run these tools and delete anything they find:
ESET online scanner:
Look for a more recent version for the BIOS.
Code:
BIOS Version/Date American Megatrends Inc. 1302, [COLOR="Red"]12/26/2008[/COLOR]
For monitoring the heat/celsius of the system, use Speccy or HWinfo:
Let us know the results, I will let you know if I find anything else in the .dmp's.
Edit:-
Are you having 2 graphic cards installed on the PC by any chance?