BSOD random "Probably caused by : ntkrnlmp.exe"

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From your most recent .dmp and bugcheck it points toward a device driver.

Starting with problematic software first:
I do not see any antivirus listed on your .nfo file, but see something from "symantec" in there.

Code:

Start Menu\Programs\Symantec Endpoint Protection	Public:Start Menu\Programs\Symantec Endpoint Protection	Public

The antivirus you are currently using is known to and contributing to your BSOD crashes, consider uninstalling it with the Norton Removal Tool and replace with Microsoft Security Essentials at least to test.

• Norton Removal Tool

Recommended antivirus program for Windows 7 based on stability compared to others:-

• Microsoft Security Essentials - Free Antivirus for Windows
• Microsoft Security Essentials Download | Free Spyware Protection
• Malwarebytes - The Free version
• Good and Free system security combination.

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.

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:

• SFC /SCANNOW Command - System File Checker

Run Disk Check on your hard disk for file system errors and bad sectors on it:

• Disk Check

Free up the start-up, nothing except the antivirus is usually needed.

• Startup Programs - Change
• Troubleshoot Application Conflicts by Performing a Clean Startup

Let us know the results.