Check if you can see the Flash animation (banner) without the system crashing at the link below:
Don't worry, it's not a video, it shouldn't crash -- if it does, this won't fix your issue. If it works without crashing, right-click on the Flash animation (banner) and uncheck "Enable hardware acceleration" from the Settings panel. You should now be able to view the YouTube videos without crashing the computer.
And on Windows 7 computers, some folks are finding relief for your issue in Internet Explorer, by opening the Control Panel-Internet Options-Advanced tab.. Once there, place a CHECK mark in the box next to "Use software rendering instead of GPU rendering", then click on "apply", then OK.
Hope this helps.
Since downloading lastest version on some sites I get a flickering image of some advert apppearing in top left of screen.
If I try to run a Tube vid it appears top left of screen in scrambled fashion and not viewable.
All since loading latest Flash Player.
Tried unistall etc and trying to back to V9 with no luck
Using Windows 7