Fix NS_S_DRM_INDIVIDUALIZED 0X000D2727 Error in Windows Media Player

You're trying to play a protected video or audio file in Windows Media Player (WMP) on Windows 10 or 11—maybe an old downloaded movie or a music file from a subscription service. Halfway through, a pop-up appears: NS_S_DRM_INDIVIDUALIZED (0X000D2727) - The security upgrade has been completed. The weird part? The file plays fine, but that message keeps popping up every time you open it.

What Actually Causes This Error

DRM stands for Digital Rights Management. It's Microsoft's way of making sure you have permission to play protected content. The error code 0X000D2727 isn't really an error—it's a status message. It means the DRM individualization process ran and already finished successfully. But Windows Media Player gets stuck showing the message instead of clearing it. This happens most often after a Windows Update changes your DRM files or when you first try to play a protected file from an older source (like a 2010-era subscription music download).

There's nothing actually broken. Your DRM upgrade worked. But the player doesn't realize it can stop telling you.

The Fix: Reset Your DRM Individualization Files

We're going to delete the cached DRM files so Windows rebuilds them fresh. This takes about 5 minutes. You won't lose any playable files—they'll just re-authorize automatically next time you play them.

1. Close Windows Media Player completely. Check your system tray (bottom-right near the clock) to make sure it's not minimized. Right-click any WMP icon there and choose Exit.
2. Open File Explorer. Press Windows Key + E on your keyboard.
3. Go to the DRM folder. In the address bar at the top, paste this path exactly and press Enter:
   

   %windir%\System32\CatRoot\{F750E6C3-38EE-11D1-85E5-00C04FC295EE}

   After you press Enter, you should see a list of files. If you get an access denied message, you're in the wrong folder—double-check the path.

4. Find the file named sysdm.cat. It's usually a small file, around 2-5 KB. If you don't see it, don't worry—it might be named differently. Look for any .cat file that was modified around the time the error started.
5. Delete that file. Right-click sysdm.cat and choose Delete. You'll get a confirmation prompt. Click Yes. Note: You might need administrator permission. If it asks, click Continue or enter your admin password.
6. If you can't delete it, the file might be in use. Reboot your PC (Start > Power > Restart), then try steps 1-4 again immediately after the desktop loads. Don't open any media players first.
7. Now open Windows Media Player again. Go to Start, type "Windows Media Player", and open it.
8. Play a protected file that previously showed the error. WMP will re-download the DRM individualization files in the background. You might see a brief "Connecting to media server" message—that's normal. After 10-20 seconds, the file should play without the error pop-up.

What to Do If It Still Shows the Error

If the error still appears after step 8, try these in order:

1. Run Windows Update. Go to Settings > Update & Security > Windows Update, click Check for updates. Install any pending updates, restart, and test again. A missing DRM security update is the most common reason this fix fails.
2. Reset the Windows Media Player library. Open WMP, press Alt to show the menu bar, click Tools > Options > Privacy tab, then click the Clear history button and check the box for "Clear all media files automatically." This doesn't delete your music—it just clears the database.
3. Try a different media player. VLC Media Player (free, from videolan.org) doesn't use Windows DRM. If the file plays in VLC without the error, the problem is definitely in WMP's DRM handling, and the fix above should work after a clean reboot.

One last thing: if you're using Windows 11, Microsoft stopped including Windows Media Player by default in some builds. You might be using the standalone "Windows Media Player Legacy" from the Optional Features list. If the error persists, install the new Media Player app from the Microsoft Store instead—it handles DRM better and won't show this confusing status message.