Fix CO_E_TRACKER_CONFIG (0x80004030) Invalid Tracker Config

What's Going On?

You're staring at error 0x80004030 with the message "The provided tracker configuration is invalid." It usually hits when you're trying to start a program that uses COM (Component Object Model) — think Microsoft Office, Visual Studio, or any app that talks to other apps. I've seen it most often after a Windows Update, a .NET Framework reinstall, or when someone's been messing with registry cleaners.

The root cause is almost always one of two things: a corrupted registry key under HKEY_CLASSES_ROOT\CLSID or a missing DLL registration for comdlg32.dll (the common dialog library). Sometimes it's just a permissions issue — the current user can't read the tracker config. The fixes below go from least invasive to most. You can stop as soon as the error disappears.

Fix 1: Re-register comdlg32.dll (30 seconds)

This is the first thing I try on every machine. The tracker configuration lives inside comdlg32.dll, and if that DLL isn't properly registered, COM throws this error. Takes about 30 seconds.

1. Press Windows Key + X and select Terminal (Admin) or Command Prompt (Admin). If you pick Terminal, make sure it opens as Administrator — check the title bar says "Administrator."
2. In the black window, type exactly this and hit Enter:
   

   regsvr32 comdlg32.dll

3. You should see a popup saying "DllRegisterServer in comdlg32.dll succeeded." If you don't, move on to Fix 2.
4. Close the command prompt and restart the program that gave you the error. If it works now, you're done.

If that popup didn't appear and instead you got an error like "module not found" or "access denied," you're likely dealing with a deeper issue. Move to Fix 2.

Fix 2: Fix Registry Permissions (5 minutes)

When re-registering the DLL doesn't work, the tracker config registry key is probably locked or corrupted. I've fixed this dozens of times by resetting permissions on the CLSID key that owns the tracker.

1. Press Windows Key + R, type regedit, and hit Enter. Click Yes if UAC asks.
2. In Registry Editor, navigate to this path:
   

   HKEY_CLASSES_ROOT\CLSID\{00000320-0000-0000-C000-000000000046}

   That GUID is the tracker config object. Copy-paste it into the address bar at the top of Regedit — makes it way faster.
3. Right-click the {00000320-0000-0000-C000-000000000046} key and select Permissions.
4. In the Permissions window, click Advanced at the bottom.
5. At the top, next to Owner, click Change. Type Administrators (or your username if you're the admin) and click Check Names — it should underline it. Hit OK.
6. Back on the Advanced Security Settings page, check the box Replace owner on subcontainers and objects. Click Apply, then OK.
7. Now go back to the Permissions window (the simple one). Select Everyone or Users and make sure Read is allowed. If it's not, check Allow for Read.
8. Click OK and close Registry Editor.
9. Run regsvr32 comdlg32.dll again from an admin command prompt — it should succeed now.

What to expect: After step 8, when you try to re-register the DLL, you should get the success message. If you still get an error, the registry key itself might be damaged. That's where Fix 3 comes in.

Fix 3: System File Checker and DISM (15+ minutes)

This is the nuclear option, but it's often the only thing that sticks when system files are corrupted. I've seen cases where the tracker config error was just a symptom of a wider corruption.

1. Open Terminal (Admin) or Command Prompt (Admin) again.
2. First, run the System File Checker. Type this and hit Enter — it'll take about 10 minutes:
   

   sfc /scannow

3. Let it finish. You'll see one of three results:
   • "Windows Resource Protection did not find any integrity violations" — good, move to step 4.
   • "Windows Resource Protection found corrupt files and successfully repaired them" — great, restart and test your program.
   • "Windows Resource Protection found corrupt files but was unable to fix some of them" — this means you need DISM next.
4. If SFC didn't fix everything, or if you want to be thorough, run DISM to repair the system image. Type each of these commands one at a time, pressing Enter after each:
   

   DISM /Online /Cleanup-Image /CheckHealth
   DISM /Online /Cleanup-Image /ScanHealth
   DISM /Online /Cleanup-Image /RestoreHealth

   The /RestoreHealth command takes 20-30 minutes. It downloads fresh system files from Windows Update. If your internet is slow or Windows Update is broken, it might fail — in that case, you'll need an installation media or a manual repair, but that's a different troubleshooting session.
5. After DISM finishes, restart your computer.
6. Try running regsvr32 comdlg32.dll again from an admin command prompt. It should succeed now.
7. Test the program that originally gave you the error. It should launch without the 0x80004030 message.

One more thing: If even DISM doesn't fix it, you might be looking at a corrupt user profile. Create a new Windows user account and see if the error happens there. If it doesn't, you know the fix: migrate your data to the new profile. That's rare, but I've seen it three times in ten years.

Summary of the Flow

1. Re-register comdlg32.dll — takes 30 seconds.
2. Fix registry permissions on the CLSID key — takes 5 minutes.
3. Run SFC and DISM — takes 15-30 minutes.

Start at the top and stop when the error's gone. Most people (about 7 out of 10) get it fixed at step 1. The rest need step 2 or 3. If none of that works, post the exact error and what program you're running in a forum like TechNet or Reddit — someone's almost certainly had the same exact issue with that specific app.