Windows 7: BSOD random "Probably caused by : ntkrnlmp.exe"

So I randomly get a BSOD, sometimes while sitting idle, other times just running firefox. Used to happen frequently trying to run SolidWorks and was a Nvidia graphics issue I though- Reformatted machine with new ATI card and now have this problem. Hopefully someone can decipher the below information as I'm not sure if it's a hardware, ie memory, or driver issue. Also attached is the dump. This is my first post, so let me know if I'm posting this in the wrong way or need any other info. Thanks in advance!

Problem signature:
Problem Event Name: BlueScreen
OS Version: 6.1.7601.2.1.0.768.3
Locale ID: 1033



Additional information about the problem:
BCCode: fc
BCP1: FFFFF8800B6C58BB
BCP2: 800000009A2E4963
BCP3: FFFFF8800B6C5560
BCP4: 0000000000000002
OS Version: 6_1_7601
Service Pack: 1_0
Product: 768_1

Welcome to SevenForums

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.
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.