in recent days, my PC more than often crashes when watching youtube videos. I get an error message as follows (I translate it, so the wording in English might be a bit different):
"Warning: not responding script:
Shockwave flash is possbibly busy or does not react anymore.
- <stop the script> XOR <Continue> ?"
Whatever you click, the system is dead, the mouse does not move anymore, and only the reboot-buttom of the pc helps. After rebooting, Firefox (33.1.1) usually asks which tabs [not] to restore. When I restore everything, then usually (not always) it will just crash again, in the same way. When I restore everything except that (malicious?) youtube movie, the PC is back to normal.
To reinstall shockwave_installer_slim.exe did not solve the problem.
Before the system is dead, I sometimes see a "video" just in black (or whatever color), but the sound of the video is still fine.