error code 0xc000000f while updating

1. Control Panel> Programs and Features.
2. Turn Windows features on or off then check .NET framework 3.5 . The pre-requisites should installed.
3. If it is not successful uninstall the KB's related to .NET framework 3.5 and then re-install them.
4. Restart your computer if needed.

If the windows update error code 0xc000000f still exists, follow some more steps to fix the issue and install/upgrade/update your operating system.

You can try these solutions to fix windows update error code 0xc000000f while updating/up grading:-

1. Perform a sfc scan so that you can fix potentially corrupted or missing files, most of cases this system file scan fix common issues with file system.
2. To do a restore to healthy previous setup with command prompt to fix potentially corrupted or missing files
3. Using windows update troubleshooter fix it tool , this is also a good tool to automatically fix most common issues.
4. By cleaning SDF (Software distribution folder) for a clean slate for Windows Update or renaming so machine itself creates a fresh one in next update.
5. Resetting PC