Why is my computer not playing or streaming videos properly after a Windows update?

Check for Windows Updates
Make sure that your computer is up to date and running on the latest version of Windows.
Check Graphics Card and Drivers
Make sure you have a compatible graphics card and the latest drivers installed.
Check Audio Card and Drivers
Make sure you have a compatible audio card and that you have the latest drivers installed.
Check Internet Connection
Connect to a secure network and ensure the internet connection is working properly.
Optimize System Settings
Ensure that your system settings are optimized for media streaming and playback.