Windoes 8 flash player installed but youtube videos not working?

I brought a laptop that already came with windows 8 installed on it and adobe flash player. it says i have adobe flash player and there are no problems with it but when i play youtube videos its just instead of the box where the video should be its just black blox instead with not even the buffering sign or play button or anything. so how do i fix this?

If you right click on the black box, do you see a menu appear (displaying About Flash Player at the bottom)?  Do you see the same behavior when using IE in either desktop or modern/metro mode?  For details on these differences and a couple of other troubleshooting steps, please see this help doc: