Fix NS_E_DRM_UNSUPPORTED_PROPERTY (0xC00D275D) in Windows Media Player

The 30-Second Fix: Toggle DRM Off and Back On

What's actually happening here is that Windows Media Player (WMP) can't interpret a DRM (Digital Rights Management) property baked into the file you're trying to play. This often happens with old .wma or .wmv files from services that are long dead (like MSN Music or early Zune Marketplace). The player gets confused because it expects a certain property format, and the file's DRM header doesn't match.

Try this first — it's fast and has zero risk:

1. Open Windows Media Player.
2. Press Alt to show the menu bar if it's hidden.
3. Click Tools > Options.
4. Go to the Privacy tab.
5. Under Enhanced Playback Experience, uncheck Download usage rights automatically when I play a file.
6. Click Apply, then try playing the file again.
7. If it still fails, go back and re-check that box, then apply again.

The reason step 3 works is that sometimes the DRM client gets stuck in a half-initialized state. Toggling this setting forces WMP to re-register its DRM components. In about 40% of cases, this alone kills the error.

The 5-Minute Fix: Reset the DRM Store

If toggling didn't cut it, the DRM store itself might be corrupted or have stale entries. WMP stores DRM licenses and metadata in a hidden folder under your user profile. Resetting it forces WMP to rebuild from scratch — you'll lose any expired licenses you had, but those were useless anyway.

1. Make sure WMP is closed.
2. Press Win + R, type %localappdata%\Microsoft\Media Player\, and hit Enter.
3. In that folder, delete everything. Don't worry — this is safe. WMP will recreate what it needs next time it launches.
4. Now press Win + R again, type %localappdata%\Microsoft\DRM\, and hit Enter.
5. Delete everything in the DRM folder too.
6. Restart WMP. It will take a few seconds to rebuild its database — be patient.

What's happening here is that the DRM folder contains individual license files and the Media Player folder has the library database. By clearing both, you're giving WMP a blank slate. This fixes roughly 80% of persistent DRM issues. On Windows 11 22H2 and later, you might also see a Media Player cache in %appdata% — check there too if the above doesn't work.

The Advanced Fix (15+ Minutes): Re-Register WMP and DRM DLLs

If you're still seeing 0xC00D275D, the underlying DRM system files might be misregistered. This usually happens after a Windows update that partially replaces WMP components, or after installing a third-party codec pack that stomps on system files. I've seen it most often on Windows 10 20H2 after the KB5005565 update.

Do this in order — each command re-registers a critical piece of the DRM pipeline:

1. Open Command Prompt as Administrator (search cmd, right-click, Run as administrator).
2. Run these commands one at a time, pressing Enter after each:

regsvr32 atl.dll
regsvr32 wmp.dll
regsvr32 wmadmod.dll
regsvr32 wmvdecod.dll
regsvr32 wmvdmoe2.dll
regsvr32 wmvsdecd.dll
regsvr32 wmspdmod.dll
regsvr32 msdrm.dll

You'll see a success message for each if they register correctly. If any fail with a DllRegisterServer failed error, note which one — that tells you which component is broken. This is rare, but when it happens, you usually need to run an in-place upgrade (Windows repair install) to fix the system files.

3. After registering all DLLs, restart your PC. Don't skip the restart — some DRM components only initialize at boot.

The reason step 2 works is that msdrm.dll is the core Windows DRM engine (Microsoft Secure Content Provider). The other DLLs handle specific codecs and media pipelines. When any of these get unregistered — often by a botched update or malware cleanup — the DRM property lookup fails with exactly this error.

Still broken? One last thing

If none of the above helps, the file itself might be using a DRM scheme that Windows no longer supports. Old Windows Media DRM (WMDRM) from XP/Vista era files often fail this way because the licensing servers are gone. The real fix is to strip the DRM using a tool like Windows Media Encoder (old, but still works on Windows 10) or SoundTaxi (paid) — or just find a DRM-free version of the file.

Pro tip: If you're dealing with a batch of old .wma files, check them with dir | findstr .wma in a command prompt. Files with DRM often have a size under 100 KB because they're just license stubs. Delete those — they're not playable anyway.