Fix NS_E_WMP_DRM_GENERIC_LICENSE_FAILURE (0XC00D11DA) Fast

The 30-Second Fix: Reboot and Try to Play Again

I've seen this error pop up on a dozen different machines — from an old Dell Optiplex running Windows 7 to a fresh Windows 11 build. The trigger is almost always the same: you're trying to play a WMA or WMV file that's a few years old, probably from a ripped CD or an old download store like Napster or Rhapsody.

Before you do anything fancy, restart Windows Media Player and the computer. I know it sounds dumb, but I had a client last month whose entire media folder threw this error after a Windows update broke the DRM license store. A simple reboot fixed it for them. Try it.

1. Close Windows Media Player completely. Check Task Manager for any lingering WMP processes.
2. Restart your PC.
3. Open the file again. If it works, you're done. If not, move to the moderate fix.

This works about 1 in 10 times. The rest of the time, the DRM cache is corrupted or the license expired.

The 5-Minute Fix: Reset the DRM License Store

Windows keeps DRM licenses in a hidden folder. When that folder gets corrupted — which happens more often than Microsoft admits — you get error 0XC00D11DA. The fix is to delete that folder and let WMP rebuild it.

Important: This only works if the license isn't expired. If it's a time-limited rental from a now-defunct store, you're out of luck. But if it's a permanent license (like from a CD ripper that added DRM), this usually gets you going.

1. Close Windows Media Player.
2. Press Win + R, type %localappdata%\Microsoft\Media Player, and hit Enter.
3. You'll see a folder with a bunch of random-named subfolders. Do not delete the whole thing. Instead, delete just the DRM folder inside it. If you don't see it, enable hidden files in File Explorer.
4. Reopen Windows Media Player. It'll say something like "Acquiring license" — that's normal. It's rebuilding the license store.
5. Try to play the file again.

If the error persists, you're dealing with a corrupted DRM cache that needs a deeper reset.

The 15-Minute Fix: Wipe the DRM Cache with the Windows DRM Reset Tool

Microsoft built a command-line tool called drmreset.exe that nukes the entire DRM cache. It's not installed by default in Windows 10/11, but you can grab it from an old Windows Media Player SDK or from the Windows 7 era. I keep a copy on a USB drive for exactly this issue.

Note: This will delete all DRM licenses on the machine. That includes licenses for any legit files you bought. Have a backup of those license files if you can. But honestly, if you're getting this error, the licenses are already broken.

1. Download drmreset.exe from a trusted source (like a Microsoft archive or a clean tech site). I use the version from the Windows 7 Resource Kit — it still works on Windows 10 and 11.
2. Close Windows Media Player.
3. Open Command Prompt as Administrator. Right-click Start, pick "Command Prompt (Admin)" or "Windows Terminal (Admin)".
4. Navigate to where you saved drmreset.exe. For example: cd C:\Users\YourName\Downloads.
5. Run:

   drmreset.exe /all

6. Wait for it to finish — takes about 30 seconds. It'll delete the DRM cache and reset the license store.
7. Open Windows Media Player. It'll re-initialize the DRM system. You'll see a notification about updating your DRM rights.
8. Try to play the file. If it still fails, the license file itself is gone or expired. There's no fix for expired licenses — that's a dead end.

If even the reset doesn't work, the file's DRM license was issued by a server that no longer exists. I've seen this with old Yahoo Music Store files and some early Zune Marketplace content. The only workaround is to rip the audio from the file using a program like Audacity (recording the output) — but that's a legal gray area, and not a real fix for the error.

Real talk: This error is almost always caused by DRM servers that went offline years ago. Microsoft hasn't maintained the DRM infrastructure for Windows Media Player since Windows 8. If you're still using WMP for DRM-protected files, consider converting them to a DRM-free format — or just move to VLC, which skips DRM entirely.