Internet Security Blog - Hackology

[Fix] The application was unable to start correctly (0x000007b)

If you are reading this its likely that you came across an error stating :

The application was unable to start correctly (0x000007b). Click OK to close the application

This error mostly occurs while you are installing heavy games of ubisoft such as assassin creed etc or even causes this prompt while trying to play Activison Games

Why we get Error 0x000007b Message

This error message occurs on 64 bit operating systems running Windows 8/8.1/10 and Server variants when the Microsoft Visual C++ Redistributable Package is not properly configured.


Fix Application was unable to Start Correctly 0x000007b Error

Continue reading to solve the 0x000007b Error so you are able to install your program or game

  • Automatically and Fix your Visual C Runtime Files
    • Download Here if you are on 64 bit or Here for 32 bit, run the install files and reboot your system to fix the issue
    • You should ensure that your system video and audio drivers are up to date
  • Manually Fix Microsoft Visual C Runtime Files
    • Download this Zip File and extract and save these files on your System.
    • The Zip contains 5 files:
      • mfc100.dll
      • mfc100u.dll
      • msvcr100.dll
      • msvcp100.dll
      • msvcr100_clr0400.dll
    • Reboot your System into “Safe Mode
    • Open C:/Windows/System32
    • Locate the 5 Files you downloaded and extracted above and copy all the files.
    • Paste the above copied files to C:/Windows/System32 replacing the old ones.
    • Reboot the System

All related errors will also be fixed if you follow the above tutorial.


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  • You should either close the running program from Task Manager …as once the dll is loaded it can not be replaced as it is already running …

    If that doesn’t help you can restart the laptop and then try the method as after restarting the said program won’t be running

    Hope it helps

  • Hello admin.
    I used the manual method but while replacing the dll files, the error ” the action cannot be done because a file or folder is open in another program”, comes up. What should I do?

  • Thank Dr.

    I am requesting you to advise me on how to identify those files that relate to the resolution of this error because their names look different in the task manager.

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