Fix NS_E_DRM_UNABLE_TO_VERIFY_PROXIMITY (0XC00D28A4) on Windows

What's happening here

You're trying to play a protected media file—could be a song you ripped from a CD years ago, a recorded TV show from Windows Media Center, or a purchased video. Windows Media Player or Media Center throws NS_E_DRM_UNABLE_TO_VERIFY_PROXIMITY (0XC00D28A4). The system's DRM (Digital Rights Management) clock got confused about location or time, so it blocks playback.

This error hit commonly on Windows 7 and Windows 8.1, but still shows up on Windows 10 and 11 when old DRM licenses conflict with newer updates or network changes. The root cause: your computer's DRM subsystem lost sync between its internal token and the media server's proximity requirement. Think of it like a timed passcode that expired mid-use.

The 30-second fix: Reboot and re-authenticate

Start here. It sounds stupid, but DRM state sometimes just needs a fresh handshake.

1. Close all media players—WMP, Media Center, VLC, anything playing protected content.
2. Open Command Prompt as admin: hit Win+X, choose "Terminal (Admin)" or "Command Prompt (Admin)".
3. Type net stop audiosrv and press Enter. Then net start audiosrv.
4. Reboot the machine—not just a sleep cycle, a full restart.
5. Try playing the file again.

Why this works sometimes: The audiosrv service handles audio endpoints and DRM initialization. Restarting it flushes stale tokens. The reboot ensures network interfaces re-register with your DNS, which matters for proximity checks against local media servers.

If the error persists, move on.

The 5-minute fix: Reset DRM individualization

DRM has a component called "individualization"—a unique ID tied to your hardware. Corruption here is the #1 cause of this error on Windows 10 and 11.

1. Open Windows Media Player.
2. Hit Alt to show the menu bar, then Tools → Options.
3. Click the Privacy tab.
4. Under "Enhanced Playback Experience," uncheck Download usage rights automatically when I play a file.
5. Click OK and close WMP.
6. Open File Explorer. Paste this into the address bar: %PROGRAMDATA%\Microsoft\Windows\DRM
7. You'll see a folder called Individualization or several drmv2*.lic files. Rename the entire DRM folder to DRM.old.
8. Launch WMP again. It'll recreate the DRM folder and re-individualize.
9. Try playing the file.

Don't delete the folder—renaming keeps a backup if something goes sideways. The reason step 6 works is that Windows rebuilds the DRM store from scratch, discarding any corrupted proximity tokens. You'll need internet access during this step for the fresh individualization to complete.

Still busted? Next step requires registry work.

The 15+ minute fix: Registry cleanup and service re-registration

This is where you fix the real underlying mess. The error can persist if your system has orphaned DRM entries from old software like Zune or Windows Media Center SDK.

Backup your registry first. File → Export in Regedit, save a full backup to your desktop.

1. Press Win+R, type regedit, hit Enter.
2. Navigate to HKEY_CURRENT_USER\Software\Microsoft\MediaPlayer\Preferences.
3. Look for a DWORD entry named Upgrading. If it exists, set its value to 0.
4. Navigate to HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\DRM.
5. Delete any key named SourceID or DRM_Flags. Do not delete the entire DRM key—just those two values if they exist.
6. Open an admin Command Prompt. Run these commands in order:

regsvr32 atl.dll
regsvr32 wmp.dll
regsvr32 wmvcore.dll
regsvr32 wmadmod.dll
regsvr32 wmasf.dll
regsvr32 wmvcore.dll
regsvr32 wmpdxm.dll

Each command should return "DllRegisterServer succeeded." If any fail, note the error—that'll point you to a corrupt system file that needs a full sfc /scannow repair.

7. Reboot. Test the file.

Why these regsvr32 steps matter: Each of those DLLs handles a specific DRM or media layer. wmadmod.dll is the Windows Media Audio Decoder—if it's unregistered, the DRM chain breaks before playback even starts. Re-registering forces the system to rebuild the COM pointers that DRM relies on for proximity checks.

When nothing works

If you've done all three fixes and still see 0XC00D28A4, the media file itself may have a license that expired or was revoked. This happens with old Windows Media Center recordings that used CableCARD DRM—those licenses were tied to a specific tuner that no longer exists. Your only option: strip DRM using a third-party tool like SoundTaxi or DRM Removal, but check local laws first. Or re-rip the content without DRM.

On Windows 11, this error sometimes means your Media Feature Pack is missing—the DRM libraries aren't installed. Go to Settings → Apps → Optional features → Add the Media Feature Pack. That's a separate issue but mimics the same error code.

One more edge case: if you're on a domain-joined machine, Group Policy might block DRM individualization. Check gpedit.msc under Computer Configuration → Administrative Templates → Windows Components → Windows Media Player → Prevent DRM Individualization. If it's enabled, your admin needs to disable it.

That's it. Start with the reboot, hit the DRM folder rename, and only dig into the registry if you must. Nine times out of ten, step 2 fixes it and you're back to your playlist in under five minutes.