Issue: "Unable to start correctly (0Xc000007b)" error

When you launch Lightroom, does the following error message appear? If so, try the solutions below in order.

Application Error message


Solution 1: Download and install a DLL package to the Lightroom installation directory.

  1. Download the following package, which contains two files: msvcr100.dll and msvcr80.dll:

  2. Extract the package contents to the following location: 

    C:\Program Files\Adobe\Adobe Photoshop Lightroom [Version]\

Solution 2: Uninstall and reinstall Lightroom.

Lightroom doesn't include an uninstaller, so you must uninstall it manually. See Uninstall Lightroom manually.

Once the uninstall is complete, reinstall Lightroom. See Download and install Creative Cloud apps.

Solution 3: Uninstall the Microsoft Visual C++ Runtime Libraries.

The Microsoft Visual C++ Runtime Libraries may cause conflict with the Lightroom installer prerequisites. To uninstall the libraries, follow the steps on the Autodesk website.

Once the removal is complete, repeat Solution 2 to uninstall and reinstall Lightroom.

Solution 4: Run a repair of, or reinstall, Windows.

Contact Microsoft if you need help doing this.

Still having trouble?

The following solutions can also solve the issue. They are easier to perform, but less likely to solve the issue than repairing or reinstalling Windows.

Contact Microsoft if you need help with steps 2, 4, and 5.

1. Install the 32-bit version of Lightroom.

  1. Locate the most recent downloaded version of Lightroom, or the most recent update.
  2. Open the installer.
  3. Instead of double-clicking the Install Lightroom.exe file, open the Adobe Photoshop Lightroom folder.
  4. Double-click the setup32.exe file to install the 32-bit version of Lightroom.

2. If you created a restore point in Windows before the problem started, revert to that point.

Users have reported success after reverting to a Windows restore point prior to the installation of the iLivid download manager.

3. Update your video display drivers.

4. Run a scan for viruses.

5. Run chkdsk to look for disk errors.


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