From Command Prompt (admin), run:
DISM /Online /Remove-Capability /CapabilityName:Media.MediaFeaturePack~~~~0.0.1.0
DISM /Online /Remove-Capability /CapabilityName:Media.WindowsMediaPlayer~~~~0.0.12.0
Restart Windows.
Launch Settings > System > Recovery. Under "Fix problems using Windows Update", select Reinstall now.
This does a repair installation, keeping your files, apps, and settings.