Well, a few days ago it happened again and again and again and again and again... At least FIVE times. Once in the morning with a Vimeo and four times in the evening with two different embedded YouTube videos on two different websites (my Firefox browser is up to date). This was too much and made me do a bit of investigating.
I did a search on the error message System Thread Exception Not Handled (atikmdag.sys) and received lots of suggestions. Fortunately one of the first few that I looked at was this thread on a Toshiba Forum from people with similar Toshiba laptops and using Firefox.
Here's the link: CLICK HERE
TOSHIBA FORUMS | Troubleshooting | Win 8 & 8.1 | System Thread Exception Not Handled (atikmdag.sys)
There were several suggestions as to updating your drivers, and doing stuff using the command line interface which I didn't want to do so I kept reading...
On page 2 of this forum thread, Jerry_Lippey suggested:
- For Firefox: Turn off hardware acceleration
- For Internet Explorer: Disable software rendering in Internet Explorer
I retested the two sites and watched the videos that made my computer crash just an hour before. They played perfectly as did the Vimeo.
This was always a random problem and usually it would occur weeks apart but I now (knock on wood and cross fingers) feel like this is an issue of the past.
Just wanted to pass this along in case you are having similar happenings.
So it goes...