There may be circumstances where Autodesk Revit 2018 products need to be removed from the workstation to allow for a clean installation.

The following process will ensure all residual files are properly removed as well.


Use the following procedure to uninstall Revit 2018 products and remove any remnants from your system. The result is a clean system on which you can reinstall.

Note that all paths listed by default are for Revit 2018. Substitute Revit LT if you are using the LT version:
Autodesk Revit LT 2018/RLT 2018
Autodesk Revit 2018/RVT 2018

Substitute the current Windows login name for %USERNAME%.

Be sure to back up any custom family or template files prior to following this procedure.

1.    Log on as a Local System Administrator and disable any Antivirus programs.

2.    Remove Revit 2018 from the Windows Control Panel:

Control Panel > Programs and Features > Uninstall the specific Revit 2018 product

3.    Remove the 2018 Material Library from the Windows Control Panel:

Control Panel > Programs and Features > Uninstall the Autodesk Material Library 2018

4.    Use Windows Explorer to locate and delete the following folders as appropriate:

• C:\Program Files\Autodesk\Revit 2018
• C:\ProgramData\Autodesk\RVT 2018
• C:\Users\%USERNAME%\AppData\Local\Autodesk\Revit\Autodesk Revit 2018
• C:\Users\%USERNAME%\AppData\Roaming\Autodesk\Revit\Autodesk Revit 2018

5.    Open the system registry (Windows Start menu > Run > Regedit). Locate and delete the following registry keys as appropriate:

• HKEY_CURRENT_USER\Software\Autodesk\Revit\Autodesk Revit 2018
• HKEY_LOCAL_MACHINE\SOFTWARE\Autodesk\Revit\Autodesk Revit 2018

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 at

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 and in the related solution, TS66513. Additional information about the registry is also contained in the Help topics in the Microsoft Registry Editor.

6.    Restart the workstation.

Before reinstalling Revit products:

1.    In Windows Explorer, delete the contents of your Windows Temp folder, but do not delete the Windows Temp folder itself. You can locate the Temp folder by entering %TEMP% in the Address bar of Windows Explorer.

2.    Use the End Task feature to end any anti-virus programs.

Note: Disabling anti-virus programs from the system tray may not be sufficient. Virus checking programs may block certain activities that are seen as suspicious (for example, accessing the registry, adding/removing/updating DLL files, and so on), even though these activities are common when installing or removing programs.

Several anti-virus programs can be disabled by right-clicking the taskbar icon and selecting Disable from the shortcut menu. For more information about disabling your anti-virus software, refer to the vendor of that software.

Important! It is important that you not only disable the anti-virus software but also use the End Task feature to end the anti-virus software.

To verify that an anti-virus program is not still running in the background as a TSR (Terminate and Stay Resident Program):

Press [Ctrl] + [Alt] + [Delete].

1.    Click Task Manager.
eTransmit for Revit 2018
2.    On the Processes tab of the Task Manager, select the process for the anti-virus program and then click End Process.

You are now ready to install Revit 2018 products on the clean system.

Note: If after following the above steps, the Revit product still reports as being installed, please view the Technical Solution: Revit appears already installed in Windows Control Panel even after a Clean Uninstall.

If you are still experiencing errors after following the steps above, please do not hesitate to contact our technical support team HERE