Clean Install and Uninstall of Revit products

1.    Log on as a Local System Administrator and disable any Antivirus programs.
 
2.    Remove the specific Revit 2015 product from the Windows Control Panel:

Control Panel > Programs and Features > Uninstall the specific Revit 2015 product


3.    Remove the 2015 Material Library from the Windows Control Panel:

Control Panel > Programs and Features > Uninstall the Autodesk Material Library 2015 


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

• C:\Program Files\Autodesk\Revit Architecture 2015
• C:\ProgramData\Autodesk\RAC 2015
• C:\Users\%username%\AppData\Local\Autodesk\Revit\Autodesk Revit Architecture 2015
• C:\Users\%username%\AppData\Roaming\Autodesk\Revit\Autodesk Revit Architecture 2015


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 Architecture 2015
• HKEY_LOCAL_MACHINE\SOFTWARE\Autodesk\Revit\Autodesk Revit Architecture 2015
• HKEY_LOCAL_MACHINE\SOFTWARE\Autodesk\RAC 2015


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 http://support.microsoft.com.

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.