Quote Originally Posted by Lord Orwell View Post
you might want to get it directly from the chipset manufacturer (amd, intel, nvidia). Microsoft update installed a perfectly functional video driver on my system but the first time i tried to enable the 2nd monitor out, i received an error telling me that the driver was for an old version of windows. ATI(amd) and NVIDIA generally release a new driver about once a month, and ati releases "profiles" for certain games whenever the game is released. You may be able to get a new driver now whereas you couldn't a month ago.

however since it's only happening on flash video, have you tried this: opt-in to the html 5 youtube experience (google it). It requires firefox or chrome or the chrome extension for IE but it doesn't use flash to play videos.
That's what I did and I still have the same issue