Automatic Downloads
1. Open Windows Media Player, click on 'Tools' and then click 'Options.'
2. Click on the 'Player' tab, then check the box next to 'Download Codecs Automatically.'

3. Click 'OK' and then try to play the video again. If you are prompted to install a codec, click 'Install.'
Microsoft Fix-It Center
4. Go to the Microsoft Fix It Solution Center and click on the 'Microsoft Fix It' icon next to the 'Video Freezes or Crashes in Windows Programs' heading.
5. Click on 'Run.'
6. Click 'Continue' or 'Allow.' The Microsoft Fix It Tool will automatically scan your computer and detect the root problem causing the codec errors. The tool will fix the problem itself or provide you with additional resources to help you fix the problem.