Locking up and automatic restarting while watching videos

This occurred when I had windows 8.1 installed, so I attempted to downgrade to windows 7. After a week, my system stability dropped and now whenever I watch videos, tested on Youtube and Hulu, on both Chrome and Firefox, my computer crashes. I attempted to get a crash report using Windows debugging tools, but a mini dump file was not created even though I have it set to small mini dump file.

My specs are:
CPU: AMD FX-8320 3.5GHz 8-Core Processor
Motherboard: Asus M5A97 R2.0 ATX AM3+ Motherboard
Memory: G.Skill Ripjaws X Series 8GB (2 x 4GB) DDR3-1866 Memory
Storage: Crucial M500 120GB 2.5" Solid State Disk
Storage: Western Digital Caviar Blue 1TB 3.5" 7200RPM Internal Hard Drive
Video Card: Sapphire Radeon R9 270X 2GB Vapor-X Video Card
Case: NZXT Source 210 Elite (White) ATX Mid Tower Case
Power Supply: SeaSonic 520W 80+ Bronze Certified Semi-Modular ATX Power Supply
Wireless Network Adapter: TP-Link TL-WN822N 802.11b/g/n USB 2.0 Wi-Fi Adapter
Case Fan: Cooler Master R4-S2S-124K-GP 44.7 CFM 120mm Fans

I was able to run an hour of League of Legends with no issues, so I am unsure what exactly is the problem. The crash also occurred in safe mode with networking, as well as with the AMD drivers uninstalled.

I am considering taking my computer to Micro Center for troubleshooting, but I would prefer repairing it at home.

Thank you.

Because you aren't getting crash dumps my best suggestion would be to use Driver Verifier.

Enable driver verifier but only enable the options: Standard settings and IRP logging step 3.
Don't enable Force Pending I/O Requests

Enable Driver Verifier to monitor the drivers.
Driver Verifier -Enable and Disable
Run Driver Verifier for 24 hours or the occurrence of the next crash, whichever is earlier.

   Information

Why Driver Verifier:
It puts a stress on the drivers, and so it makes the unstable drivers crash. Hopefully the driver that crashes is recorded in the memory dump.

How Can we know that DV is enabled:
It will make the system bit of slow, laggy.

   Warning

Before enabling DV, make sure that you have earlier System restore points made in your computer. You can check it easily by using CCleaner looking at Tools > System Restore.

If there are no points, make a System Restore Point Manually before enabling DV.

   Tip

• If you fail to get on the Desktop because of DV, Boot into Advanced Boot Options > Safe mode. Disable DV there. Now boot normally again, and try following the instruction of enabling DV again.
• If you cannot boot in Safe mode too, do a System Restore to a point you made earlier.

Let us know the results, with the subsequent crash dumps, if any.

Thanks for the support Thedoctor44.

I setup Driver Verifier without enabling Force Pending I/O Requests, and as you guessed my computer would not boot to the desktop. I disabled DV through Safe Mode. Attached is my minidump file as well as other pertinent information gathered from DM Log collector.

Your WinCDEmu virtual CDROM driver is causing issues.
Remove the entire software.

What a name for the driver eh?

Code:

*** WARNING: Unable to verify timestamp for BazisVirtualCDBus.sys
*** ERROR: Module load completed but symbols could not be loaded for BazisVirtualCDBus.sys
Probably caused by : BazisVirtualCDBus.sys ( BazisVirtualCDBus+137cb )

The software has been completely removed. Should I attempt to run the DV once again? When the error occurred in Windows 8, I used the built in virtual CDROM, so I am not too convinced that this is the issue.

Edit:
Played a Hulu video for less than two minutes, computer rebooted itself. No new dump file was created.

Hmm, I can't find anything else.

Switch to Kernel Memory Dumps by following these instructions.

Dump Files - Configure Windows to Create on BSOD

Once changed, go to C:/Windows/memory.dmp after a BSOD has occurred, then upload that dump file unzipped to OneDrive.

Leave Driver Verifier running.
I can't find anything else in the latest dump files which is why we need another one.

Alright, thanks again.
I was able to get to my desktop with DV running. I will let it run, as you said, until it crashes or until 24 hours have passed.

So there has been no crashes. I was messing around with the audio drivers again and it seems that the AMD Audio Drivers may be the cause. I disabled them and have been able to play videos on Youtube, Netflix, and Hulu with no issues. I will continue testing it today and if there are no crashes will conclude that the audio drivers are the cause of the crashing.

That's good news :)
Keep us posted.

Before closing this issue, I made one last attempt to salvage the AMD drivers by updating my motherboard's bios. I understood the risk of bricking my motherboard but went ahead with it. After some hours of watching Hulu, there have been no crashes. Since this is the only change I have made I want to say it was the "cure" to my computer's instability, but I will post again if a crash occurs. If no crash occurs by the end of the week I will mark this thread as solved. Thank you Thedoctor44 for all your help.

Aside: After updating my bios through Asus Ez Update, the windows application not through USB flashing, the program asked me to restart the computer so the changes could occur. Yet, the computer did not boot back up, even though it was on. I want to say it was a lack of power, and after about 5 minutes I went ahead and did a hard reboot, fearing that my motherboard was bricked. Yet obviously it isn't bricked. My only concern is, if I were to update my bios in the future, only if I needed to, how would I go about booting if it just gets "stuck." I am pretty sure causing a hard reboot isn't the best method but I didn't want to pull the plug on my PSU either.