Fix NS_E_WMP_DRM_NO_DEVICE_CERT (0XC00D11E3) on Windows

Quick answer for advanced users

Delete the DRM folder in %USERPROFILE%\AppData\Local\Microsoft\DRM, then run %windir%\SYSTEM32\regsvr32.exe drmupd.dll as admin. This forces Windows to rebuild the certificate chain.

Why this error happens

Windows Media Player uses DRM (Digital Rights Management) to play protected content like old WMA files from Zune or PlaysForSure services. The error 0XC00D11E3 means the device certificate — a small file that proves your PC is authorized to play the media — is either missing, expired, or corrupted. I've seen this mostly on Windows 10 and 11 after a major update, or when someone copied protected music from an old PC without migrating the DRM licenses. Had a client last month whose entire library of purchased tracks went silent after a fresh Windows install. This fix brought them back.

Numbered fix steps

1. Close WMP completely. Make sure no media player is running. Check Task Manager if unsure.
2. Open File Explorer and paste this into the address bar: %USERPROFILE%\AppData\Local\Microsoft\DRM. Hit Enter.
3. Delete everything in that folder. Don't worry — these files will be recreated automatically. If Windows says a file is in use, you missed step 1.
4. Open Command Prompt as Administrator. Press Win+X, choose Terminal (Admin) or Command Prompt (Admin).
5. Run this command:

   %windir%\SYSTEM32\regsvr32.exe drmupd.dll

   You'll see a confirmation that the DLL registered successfully.
6. Restart your PC. Don't skip this — Windows needs to rebuild the DRM store.
7. Open Windows Media Player and try playing the file that caused the error. It should work now.

Alternative fixes if the main one fails

If the error persists, check these:

• Reset WMP settings: Open WMP, go to Tools > Options (or press Alt+T), find the Privacy tab, and click Reset DRM. That triggers a fresh certificate request.
• Check Windows Update: An old Media Foundation stack can cause this. Run wuauclt /detectnow or just check Settings > Windows Update. Had one case where a missing KB patch fixed it instantly.
• Run the Media Creation Tool: If you're on a very old version (like 1507 or 1511), in-place upgrade to the latest feature update. DRM components get replaced during the upgrade.

Prevention tip

Before you do a clean install of Windows, back up your DRM folder. Copy %USERPROFILE%\AppData\Local\Microsoft\DRM to an external drive. After the reinstall, paste it back. This saves your certificates and licenses. If you're using a Microsoft account, sync your media licenses to the cloud first — right-click on protected files and choose Restore license.

Also, keep Windows Media Player updated. It's not installed by default on Windows 11, but you can add it via Optional Features. Old versions have known DRM bugs that Microsoft won't patch anymore.