Revit install states Revit is already installed

Issue:
After uninstalling Revit and then reinstall Revit and received Revit is already installed. Either Revit was uninstalled through the control panel, program and features, uninstalled through setting, apps, or using the uninstaller located at, for an example C:\ProgramData\Autodesk\Uninstallers\Autodesk Revit 2024 may cause this issue.

Causes:
Sometimes uninstalled Revit through the control panel, program and features, uninstalled through setting, apps, or using the uninstaller located at C:\ProgramData\Autodesk\Uninstallers\Autodesk Revit 2024 may still cause this issue. Been seeing this issue more and more lately with reinstalling Revit.

Solution:
See solutions options at  "Autodesk Revit is already installed." when attempting to install Revit
One solution is to try the Microsoft Fixit tool, some have stated that the Microsoft Fixit Tool is unable to fix the issue whether you select trying to install or tying to uninstall options.
The option that seems to work is to go into the registry and remove folders from three locations.
These locations are.
\HKEY_CURRENT_USER\SOFTWARE\Autodesk\Revit\2024
\HKEY_CURRENT_USER\SOFTWARE\Autodesk\Revit\Autodesk Revit 2024
\HKEY_LOCAL_MACHINE\SOFTWARE\Autodesk\Revit\2024
\HKEY_LOCAL_MACHINE\SOFTWARE\Autodesk\Revit\Autodesk Revit 2024
If these locations exist (uninstalling may have remove these folders) and the main key that should be delete is located at HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\
See section “Clear the registry from the Revit key” link above for the folder based on the Revit version you are having problem installing.

If you require customer to edit the registry, add this prior to the steps:
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 well as the system.dat and user.dat files as outlined for your operating system in the Microsoft Knowledge Base.  Additional information about the registry is also contained in the Help topics in the Microsoft Registry Editor.

About the Author

Sr. Support Specialist<br><br>Paul is responsible for client technical support as well as the set-up and configuring of plotters; support and service calls; and the installation, demonstration, and education of clients in AutoCAD, AutoCAD Architecture, AutoCAD MEP, AutoCAD P&ID, Advance Steel, Navisworks, Raster Design, Revit Architecture, Revit MEP, Revit Structure and 3D Studio MAX. He draws upon his years of experience as a technical engineer to assist customers in the creation and implementation of standards, the set-up of plotter and pen styles and the creation of custom blocks.

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