On my Windows 8.1 PC, upon switching to fullscreen view on YouTube or playing any video in Zune or Windows Media Player, a strange green backdrop appears on top of 75% of the video playing and only 25% of the video is viewable. Full screen in YouTube and playing videos used to work fine but I don't remember when this started happening. Applications such as VLC Media Player and QuickTime work fine, so I'm stuck using those for now. I attached two pictures with examples of the problem I'm referring to.

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Any help for this issue is appreciated and if you need additional details let me know and maybe I can help. Thanks.