Windows Media Player Doesn't play video files or DVDs (Windows 7 Home Premium)

Hello,
I recently purchased a new hard drive and installed Windows 7 Home Premium on it. Since then, Windows Media Player has not been able to play any kind of video files or DVDs. I have tried using the Fixit tool and turning the WMP off and on with the Windows
Features menu, but it has not solved the problem. I have also made sure that my video and audio drivers are up to date.
The errors that come up say:
Windows Media Player cannot play the file. The Player might not support the file type or a required codec might not be installed on your computer.
and
Windows Media Player cannot play DVD video. You might need to adjust your Windows display settings. Open display settings in Control Panel, and then try lowering your screen resolution and color quality settings.
Any help with this would be great, because I like using WMP better than other media players.

Hi,
Firstly, please try to use the Video example in C:\Users\Public\Videos\Sample Videos if it could play normally.
Secondly, try to reinstall Graphic Card driver for test.
If problem persists, try to remove WMP in Windows feature and add it again for test.
Roger Lu
TechNet Community Support

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