Welcome
:note: I am not on my BSOD computer right now, I will check the dumps as soon as I am. ITMT,
Problematic software
Code:
Start Menu\Programs\Norton Security Suite Public:Start Menu\Programs\Norton Security Suite Public
Start Menu\Programs\McAfee Security Scan Plus Public:Start Menu\Programs\McAfee Security Scan Plus Public
Norton and McAfee are known to cause BSODs. Suggest you to uninstall them both using their Removal Tool (search in google). Replace with Microsoft Security Essentials (at least to test). It's free, light weight and does not cause problems on the windows 7 OS. For extra security, you may use the free version of Malware Bytes.
Run a full scan with both (separately) once downloaded, installed and updated.
Your graphic card drivers also need to be updated. Click on the Start

rb: ► Control Panel ► Programs ► Uninstall a program ► Uninstall all ATI the related stuff. Delete remnants of ATI drivers using
Driver Sweeper. Download and install the latest drivers from the manufacturers website or from a source like filehippo.com (64 bit in your case).
Code:
Driver c:\windows\system32\drivers\atikmpag.sys (8.14.1.6160, 280.50 KB (287,232 bytes), 5/30/2012 2:44 PM)
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:
Free up your start up, keep nothing except the antivirus (sound card & video drivers, if necessary)
Let us know the results, good luck