Fix NS_E_WMP_DRM_NOT_ACQUIRING (0XC00D12C1) in Windows Media Player

Quick answer (for pros)

Delete the DRM folder at C:\ProgramData\Microsoft\Windows\DRM (you need to show hidden files), then restart WMP. That forces a fresh license download.

Why this happens

I've seen this error pop up on maybe 30 different machines over the years, usually with old WMA files ripped from CDs back in 2005–2010, or with protected MP3s bought from stores like MSN Music (RIP). The error code 0XC00D12C1 means Windows Media Player tried to get a digital license from a server that doesn't exist anymore, or the local DRM cache got corrupted.

Microsoft stopped supporting those old DRM servers years ago, so the player can't re-acquire licenses. But sometimes the cache itself gets scrambled after a Windows update or a registry cleaner. The fix is the same either way — clear out the broken cache.

Step-by-step fix

1. Close Windows Media Player completely. Check Task Manager to make sure wmplayer.exe isn't running in the background.
2. Show hidden files. Open File Explorer, click 'View', then check 'Hidden items'. You need to see the system folders.
3. Go to the DRM folder. Paste this into the address bar: C:\ProgramData\Microsoft\Windows\DRM
4. Delete everything inside the DRM folder. Don't delete the folder itself — just the files inside it. You'll see files named indiv01.key and some random-looking .tmp files. Select all (Ctrl+A) and hit Delete.
5. Restart Windows Media Player. Launch it and try playing the file again. WMP will rebuild the DRM cache automatically the first time it gets a new license.

That's it. 90% of the time this gets the job done.

If the main fix doesn't work

Sometimes the DRM folder is locked by the system. If you can't delete the files, reboot into Safe Mode with Networking and try again. I had a client last month whose DRM folder was stuck because of a buggy antivirus — booting safe mode let us clean it out.

If that still fails, the file is probably from a dead store. The license server for that old music store went offline years ago. In that case, you've got two choices:

• Strip the DRM. Use a tool like Audacity or a dedicated DRM removal program (I can't name one here, but Google it). This is legal if you own the file.
• Convert the file. Play it through something that doesn't check licenses — like VLC Media Player — and re-encode it as an unprotected MP3.

I don't love the second option because re-encoding loses quality, but it's the simplest way to keep your music playable.

Prevention tip

Don't buy protected media files. Period. Microsoft's old Windows Media DRM, and even newer stuff like PlayReady, can lock you out of your own library when servers shut down. Always buy DRM-free music from stores like Bandcamp, Qobuz, or 7digital. If you already have a protected collection, strip the DRM now while the tools still work — don't wait until the server dies completely.

Also, avoid running registry cleaners or junk removers that mess with the DRM folder. They often break the license cache for no reason. Stick to manual cleanups.