How to Fix Windows Error 0xC000007B

What Causes This?

Windows error 0xC000007B usually appears when a 32-bit app tries to load 64-bit files, or the other way around. It can also happen when important runtime components are missing or damaged, especially Microsoft Visual C++ Redistributables, .NET, or DirectX files. In some cases, corrupted system files or leftover app files from an older install cause the conflict.

Common Symptoms

• An app or game shows “The application was unable to start correctly (0xC000007B)”
• The program closes immediately after launch
• The error appears after reinstalling a game, launcher, or Windows update
• Only one specific app fails while the rest of Windows works normally
• The issue keeps coming back even after reinstalling the app

How to Fix It Manually

1. Restart your PC first

   • Save your work and restart Windows.
   • Try opening the app again. If the error was caused by a temporary file lock or failed update, a restart may clear it.

2. Reinstall the affected app completely

   • Press Windows + I to open Settings.
   • Go to Apps > Installed apps.
   • Find the app or game showing the error, click the three dots, then choose Uninstall.
   • After uninstalling, delete leftover files if they remain in:
     • C:\Program Files\
     • C:\Program Files (x86)\
     • %AppData%
     • %LocalAppData%
   • Reinstall the latest version from the official source.

3. Repair or reinstall Microsoft Visual C++ Redistributables

   • Press Windows + S, type Control Panel, and open it.
   • Go to Programs > Programs and Features.
   • Look for all entries named Microsoft Visual C++ Redistributable.
   • For each one, select it and click Change > Repair if available.
   • If repair does not help, download and reinstall the latest supported x86 and x64 Visual C++ packages from Microsoft’s website.
   • Restart your PC after installation.

4. Run System File Checker and DISM

   • Press Windows + S, type cmd.
   • Right-click Command Prompt and choose Run as administrator.
   • Run this command:

     sfc /scannow

   • When it finishes, run:

     DISM /Online /Cleanup-Image /RestoreHealth

   • Restart your PC and test the app again.

5. Update .NET Framework and DirectX

   • Open Settings > Windows Update and click Check for updates.
   • Install all available updates, including optional runtime updates.
   • If the problem is with a game, install the latest DirectX End-User Runtime from Microsoft.
   • Restart your PC.

6. Check whether the app version matches your system

   • Press Windows + I > System > About.
   • Check whether your Windows installation is 64-bit.
   • If you installed an unusual or older app build, make sure you are using the correct x86 or x64 version required by the app.
   • If the app came with bundled DLL files from a third-party source, remove them and reinstall the official version.

7. Run the app as administrator

   • Right-click the app shortcut or .exe file.
   • Select Run as administrator.
   • If that works, right-click the app, choose Properties > Compatibility, and enable Run this program as an administrator.

Fix It Automatically with Kudu

If you do not want to hunt through leftover folders, broken runtimes, and bad app files manually, Kudu can help. It scans for junk files, invalid leftovers, and system issues that often contribute to errors like 0xC000007B, then helps you clean them up safely.

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