Youtube Fullscreen Not Working

[ag993]

Hey I have Windows Vista Home Premium and a pretty good computer but when i try to play youtube or dailymotion videos in full screen it gives me a big grey screen, I thought it might be caused by some recent change to the computer but negative. Can anyone please help me?

Click here to see my screen in normal youtube.
http://img216.imageshack.us/img216/193/embeddedmodeji8.jpg

Click here to see my screen after clicking on full screen.
http://img216.imageshack.us/img216/9957/fullscreenmodezk3.jpg

[DaveLembke]

Check to make sure you all all ms updates and latest video GPU driver... Only other issue could be codec problem, but if it plays in smaller window and not full screen it should be fine. If you have integrated video, you might be demanding too much of the system, but being that it is a new system it should be fine even with a lower end GPU.

[Broni]

Uninstall Adobe Flash Player, using this: http://kb.adobe.com/selfservice/viewContent.do?externalId=tn_14157
Install fresh copy.