Welcome
It seems to be your Avast Firewall. Uninstall firewall and anti virus. Replace with the Windows Firewall, and Microsoft Security Essentials. For added protection download and make a weekly scan with malwarebytes. Good luck

Leave the prior changes until we get to the bottom of this. Take a driver verifier test for 36 hours


Driver Verifier Inst

Since the driver that crashed you has not been listed you shouldrun driver verifier
Please run Verifier with these settings:
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Using Driver Verifier is an iffy proposition. Most times it'll crash and it'lltell you what the driver is. But sometimes it'll crash and won't tell you thedriver. Other times it'll crash before you can log in to Windows. If you can'tget to Safe Mode, then you'll have to resort to offline editing of the registryto disable Driver Verifier.
So, I'd suggest that you first backup your stuff and then make sure you've gotaccess to another computer so you can contact us if problems arise. Then make aSystem Restore point (so you can restore the system using the Vista/Windows 7Startup Repair feature).
Then, here's the procedure:
- Go to Start and type in "verifier" (without the quotes) and pressEnter
- Select "Create custom settings (for code developers)" and click"Next"
- Select "Select individual settings from a full list" and click"Next"
- Select everything EXCEPT FOR "Low Resource Simulation" and click"Next"
NOTE: You can use Low Resource Simulation if you'd like. From my limitedexperimentation it makes the BSOD's come faster.
- Select "Select driver names from a list" and click "Next"
Then select all drivers NOT provided by Microsoft and click "Next"
- Select "Finish" on the next page.
Reboot the system and wait for it to crash to the Blue Screen. Continue to useyour system normally, and if you know what causes the crash, do thatrepeatedly. The objective here is to get the system to crash because DriverVerifier is stressing the drivers out. If it doesn't crash for you, then let itrun for at least 36 hours of continuous operation (an estimate on my part).
Reboot into Windows (after the crash) and turn off Driver Verifier by goingback in and selecting "Delete existing settings" on the first page,then locate and zip up the memory dump file and upload it with your next post.
If you can't get into Windows because it crashes too soon, try it in Safe Mode.
If you can't get into Safe Mode, try using System Restore from yourinstallation DVD to set the system back to the previous restore point that youcreated.

Enable the driver verifier

www.sevenforums.com/crash-lockup-debug-how/65331-using-driver-verifier-identify-issues-drivers.html