Fix: Error 0xc00007b “Application was unable to start correctly”

0xc00007b “the application was unable to start correctly”. There are several reason for the error 0xc00007b to pop-up. The most common cause of this issue is the incompatibility between the 32-bit applications and the 64-bit with your system. An example of this is when a 32-bit application tries to execute itself on a 64-bit system.

In this guide; i will list all solutions as methods that has reportedly worked for our users. You should follow each method starting from Method 1 and stop at the one that works for you.


Method 1: Repair Corrupt System Files

Download and run Reimage Plus to scan and restore corrupt and missing repositories from here, and then try updating Windows. If it doesn’t work, move to Method 2.

Method  2: DirectX

1. Hold Windows Key and Press R

2. Type “C:\Windows\System32” in the run dialog and click OK

3. Locate the following files and delete them; then empty the trash.

“xinput1_1.dll”, “xinput1_2.dll”, “xinput1_3.dll” and all other files started with xinput1_*.dll. Be careful while deleting, because if an incorrect file is deleted; you will run into new issues.

4. After the files are deleted, click the link below to download and run the DirectX setup

5. Run the downloaded file; and follow the prompts on screen to install DirectX.

6. Once it has been installed, reboot your computer and then try running the application.

If the issue is still not resolved, then proceed to METHOD 2

Method 3: Re-install .NET Framework

1. Go to the Microsoft Site for .NET Framework by Clicking Here

2. Download the latest .net framework from the site and install it.

If the issue is still not resolved, then proceed to METHOD 3

Method 4: Re-install your Application

Uninstall the application you are trying to run, and re-install it. If it won’t uninstall then use RevoUninstaller to force fully remove it; and with the Advanced Option, you can remove any traces and left overs found. This helps with the clean install.

After the application has been reinstall; try to re-open it. If it still would’nt re-open, then try running it as an administrator by right clicking on it and selecting


After the uninstall; the re-install and attempts to run it as administrator, restart your computer and re-attempt. Some applications requires the users to reboot the PC.

Method 5: Run CHKDSK

Run the chkdsk; by following the steps at

Method 6: Replace DLL’s for 64 Bit System

If none of the above methods have worked, and the system type is 64 bit then proceed with the method below.

1. First download the DLLs by Clicking Here

2. Then extract them to a folder on your desktop.

3. Hold Windows Key and Press R

4. Type “C:\Windows\System32” in the run dialog and click OK

5. Copy the extracted files (mfc100.dll, mfc100u.dll, msvcr100.dll, msvcp100.dll and msvcr100_clr0400.dll) and paste them to System32; if prompted about the files already existing, then select “replace”.

Method 7: Install & Run VC Redist

1. Download VC Redist Installer and run it.

2. Reboot the computer and test.

Expert Tip

Fix: Error 0xc00007b “Application was unable to start correctly”

If the issue is with your Computer or a Laptop you should try using Reimage Plus which can scan the repositories and replace corrupt and missing files. This works in most cases, where the issue is originated due to a system corruption. You can download Reimage by clicking the Download button below.

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