Youtube keeps crashing my PC

I have been having some trouble with my PC when it comes to youtube videos, especially when I have multiple windows of it open. At first it only affected Google Chrome. Which is odd because I was only watching youtube with HTML5 (uninstalled Adobe). Then it crashed my entire computer and I had to reinstall Windows 7. Now even with Flash player and Firefox it won't let me open one window without freezing and crashing. Can you guys please help. My PC is bad ass but it can't more of this.

Not sure if troll or cereal. If you are cereal, then let me tell you that YT does not crash computers and destroy OSes.

Beyond serious. This is really pissing me off. I don't know what to do! I just want my pc to work.

What does chrome/firefox/flash log in eventlog?

Have you tried removing Firefox, chrome and flash and remove all preferences then re-installing them?

 

Please include any troubleshooting steps you have already attempted as well :)

Chrome usually uses and runs your graphics card more than firefox, safari, or * shudder * IE.....and especially with youtube videos, maybe you have a dying video card?