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🛠️ How to Fix Error 0xc00007b: “The Application Was Unable to Start Correctly” on Windows

If you’re getting the error message 0xc00007b – The application was unable to start correctly, you’re not alone. This is one of the most common issues Windows users face, especially when trying to launch popular games or graphics-heavy applications like Roblox, GTA V, or Fortnite.

This error usually means there’s a mismatch between 32-bit and 64-bit files, especially related to DirectX or system DLLs. Fortunately, it’s easy to fix with a few guided steps.

🎮 Why Does This Happen? (Especially for Games Like Roblox)

Games like Roblox require key system components like DirectX, Microsoft Visual C++ Redistributables, and .NET Framework to run properly.

If one of these is:

  • Missing

  • Outdated

  • Corrupted
    …then your game might crash before it even starts — giving you that dreaded 0xc00007b error.

Let’s fix it step-by-step:

✅ Step 1: Enable .NET Framework in Windows Features

  1. Open the Start Menu and search for Control Panel.

  2. Inside the Control Panel, select Programs > Turn Windows Features On or Off.

  3. Make sure the following boxes are checked:

    • .NET Framework 3.5

    • .NET Framework 4.8 Advanced Services

  4. Click OK and let Windows install the necessary files.

  5. Choose the option to download from Windows Update if prompted.

.NET Framework is crucial for apps like Roblox that rely on backend Windows functions.

🗑️ Step 2: Delete Corrupted xinput1_3.dll Files

We’ll now manually delete any broken DirectX files.

A. Delete xinput1_3.dll from System32:

  • Go to C:\Windows\System32

  • Scroll down and locate xinput1_3.dll

  • Right-click and select Delete

B. Delete xinput1_3.dll from SysWOW64:

  • Go to C:\Windows\SysWOW64

  • Find xinput1_3.dll

  • Right-click and Delete this as well

These files will be reinstalled correctly in the next step.

🌐 Step 3: Reinstall DirectX (Safely from Microsoft)

  1. Visit the official Microsoft DirectX Runtime page:
    👉 https://www.microsoft.com/en-us/download/details.aspx?id=35

  2. Download and run dxwebsetup.exe

  3. Uncheck optional offers like Bing Bar

  4. Follow the steps to complete the DirectX installation

This step restores essential DLLs that are required by most games and software.

🔄 Step 4: Update Windows

  1. Open Settings > Windows Update

  2. Click Check for updates

  3. If any updates are found, install them

  4. Restart your computer afterward

Running the latest version of Windows helps fix compatibility errors like 0xc00007b.

✅ Final Recap: Fixing Error 0xc00007b

By now, you should have:

  • Enabled both .NET Framework versions

  • Deleted corrupted xinput DLL files

  • Reinstalled DirectX from Microsoft

  • Updated your Windows OS

This complete process should eliminate the 0xc00007b error for good, especially for game lovers and Roblox players.

📌 Common Keywords Related to This Error:

  • Error 0xc00007b fix for Windows 10/11

  • The application was unable to start correctly

  • Roblox won’t start on Windows

  • xinput1_3.dll error fix

  • DirectX end-user runtime download

  • Fix game crashing error

💬 Still Having Issues?

Leave a comment below with your system specs or the exact error message, and we’ll try to help! If this guide helped you out, feel free to share it with someone else experiencing the same issue.

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