Crashing from YouTube?

[Syribo]

I can't figure this out... But I was showing some friends a video on YouTube and about one minute into the video, artifacts were all over the screen and my computer locked up completely. Had to shut it down.

This happened two more times on the same video, and then I tried it on two different other videos and it also happened.

My temps are fine, on my CPU and GPU. (I also set the video cards speed to stock, No overlock) I ran ATI Tool and it was fine, even though it was actually showing like 98FPS, it usually shows the number 1,218 or something. And I ran Prime95 along with 3DMark a few times and nothing happened. Also opened WoW and have been playing a bit with no problems.

What...the heck could be wrong? What else should I try?

 

[BlindedByScience]

Doesn't sound like hardware to me. What browser are you using? Got all your OS updates installed properly? That's the path I'd head down.....

 

[xref]

Uninstall Adobe Flash using the utility found on Adobe's website, then reinstall.