Fix NS_E_WMP_WMDM_NORIGHTS (0XC00D11A9) sync error

Quick fix (30 seconds): Check if the file is DRM-protected

What's actually happening here is that the file you're trying to sync has a digital rights management (DRM) license that either expired or the device isn't authorized to play it. The error code 0xC00D11A9 maps to NS_E_WMP_WMDM_NORIGHTS — Windows Media Player knows the file is there, but the content provider says nope.

Right-click the file in WMP's library and select Properties. Look at the Media Usage Rights tab. If you see "This file is protected with a license that cannot be transferred to a portable device", that's your culprit.

If the file came from a store like the old Zune Marketplace or a subscription service, you're out of luck — those licenses are dead. Either purchase a DRM-free version, or use the moderate fix below to strip the protection.

Moderate fix (5 minutes): Remove DRM and re-sync

Skip the DRM-stripping tools that promise magic — most are malware-infested garbage. The real fix is to use Windows Media Player's built-in burn and re-rip trick. This works because the DRM only applies to the original file, not to a burned audio CD.

1. Insert a blank CD-R into your drive.
2. In WMP, drag the protected file to the Burn list. If it won't burn, the DRM is too strict — jump to the advanced fix.
3. Click Start burn and let it finish. Use a CD-RW if you want to re-use the disc later.
4. Put the burned CD back in the drive, open WMP, and click Rip CD. Pick a format like MP3 or WMA (unprotected). WMP will rip the audio as a new, DRM-free file.
5. Delete the original protected file from your library (or just hide it). Add the new ripped file and try syncing again.

Why this works: Burning creates an analog audio stream on the CD — DRM doesn't survive that conversion. The rip re-encodes that stream into a fresh file with no rights restrictions. You lose a tiny bit of quality in the re-encode, but I've never heard a difference on portable earbuds.

Advanced fix (15+ minutes): Reset sync partnership and device authorization

Sometimes the error isn't about DRM at all. The device itself — an old Zune, a Nokia phone, or a generic MP3 player — has a stored sync partnership that's corrupted. WMP checks this partnership before every sync. If it's busted, you get 0xC00D11A9 even on unprotected files.

Here's how to wipe that partnership clean:

1. Disconnect the device from your PC.
2. Press Win + R, type regedit, and hit Enter. Back up the registry first — right-click Computer and select Export.
3. Navigate to:

   HKEY_CURRENT_USER\Software\Microsoft\MediaPlayer\Preferences

4. On the right, look for a DWORD named AcceptedEULA. Double-click it, set the value to 0, and click OK. This forces WMP to re-run its first-run setup.
5. Now navigate to:

   HKEY_CURRENT_USER\Software\Microsoft\MediaPlayer\Services

   Delete the entire Services key. Don't worry — Windows recreates it when you open WMP next.

6. Close regedit. Open WMP, accept the EULA again (it'll prompt you), then reconnect your device. WMP will treat it as a brand new sync partner.

If the error persists, the device's own firmware might be the problem. Check the manufacturer's site for a firmware update. For example, older Creative Zen players had a known bug where the sync handshake would fail after Windows 10 version 1809.

Still stuck? Switch to a tool that doesn't use WMP's sync engine entirely. MediaMonkey or CopyTrans handle DRM and device partnerships better than WMP ever did on Windows 10 and 11.