"Autodesk Revit ... is already installed." when attempting to install the program (or an update to) Revit 2021 or newer version

Autodesk Support

Nov 15, 2024

Products and versions covered

Issue:

Example:

When attempting to install the program (or an update to) Revit 2021 or a newer version, a message like the following appears:


Autodesk Revit 2021 is already installed.

Autodesk Revit 20xx is already installed

Depending on the installation media used, the following Install Wizard is presented:
Revit 2021 is detected as already installed but it will not launch / cannot be found on the system
 
 

Causes:

  • Remnant files from a previous installation. 

Solution:

Microsoft Install troubleshooter

The following Microsoft trouble-shooter can be used to help with situations like this:
  1. Download Microsoft Uninstall Troubleshooter. 
  2. Launch it and select Next > Uninstalling.
  3. If Revit shows up in the list, select it.
    1. If Revit does not show up, select Not Listed.
    2. Paste the appropriate value below for the Product Code: 
2021: {7346B4A0-2100-0510-0000-705C0D862004}
2022: {7346B4A0-2200-0510-0000-705C0D862004}
2023: {7346B4A0-2300-0510-0000-705C0D862004}
  1. Click Next. Wait until the process is completed.
  2. Retry the Revit installation.

    Manually clear registry keys

    If you can't download/run the Microsoft troubleshooter, or if it isn't working for you, try clearing the Revit registry keys manually:
    1. Open the Windows Registry (Start > type regedit > press ENTER).
    2. Navigate to HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\.
    3. Find the appropriate key below:
    • For Revit 2021: {7346B4A0-2100-0510-0000-705C0D862004}
    • For Revit 2022: {7346B4A0-2200-0510-0000-705C0D862004}
    • For Revit 2023: {7346B4A0-2300-0510-0000-705C0D862004}
    1. Right-click on the key and select "Rename".
    2. Append .old at the end of the key. For example, with 2023, it would be {7346B4A0-2300-0510-0000-705C0D862004}.old.
    3. Retry the Revit installation.

    Warning!

    Problems caused by improperly editing the Windows registry could render your computer operating system unusable. Microsoft provides a wealth of critical information that you need to know about the registry in the Microsoft Knowledge Base. Use the Microsoft Registry Editor only at your own risk and only after backing up the registry as outlined for your operating system in the Microsoft article How to back up and restore the registry in Windows and in the related solution How to back up the system registry. Additional information about the registry is also contained in the Help topics in the Microsoft Registry Editor.

       

        Reinstall Microsoft Visual C++ Runtime Libraries

        If the steps above are not clearing the issue, try reinstalling the Visual C++ Runtime Libraries:
        1. Follow the steps in the article How to remove and reinstall Microsoft Visual C++ Runtime Libraries
        2. Retry the Revit installation.

        Products:

        Revit Product Family;

        Versions:

        2021; 2022; 2024; 2023;

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