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