You can watch titles in Ultra HD if your device, plan, and connection speed support it. If you meet our Ultra HD requirements but are not seeing Ultra HD titles when you browse Netflix, follow the troubleshooting steps for your device below.
Your computer may be missing an extension required for Ultra HD 4K playback.
Install the HEVC Video Extension
Navigate to Microsoft's HEVC Video Extensions page.
If a dialog box appears, select Open Microsoft Store, then select Get again.
Once the extension has successfully downloaded, try Netflix.