Revit appears already installed in Windows Control Panel, even after a Clean Uninstall

Issue

Solution

Erase the following 3 registry keys. This will indicate Revit has been uninstalled to Windows Installer:

Autodesk Revit Architecture 2013 English:
0A4B643700310110409007C5D0680240

Autodesk Revit Structure 2013 English:
0A4B643700310120409007C5D0680240

Autodesk Revit MEP 2013 English:
0A4B643700310130409007C5D0680240

Autodesk Revit 2013 English:
0A4B643700310150409007C5D0680240

Autodesk Revit Architecture 2012 English:
0A4B643700210110409007C5D0680240

Autodesk Revit Structure 2012 English:
0A4B643700210120409007C5D0680240

Autodesk Revit MEP 2012 English:
0A4B643700211130409007C5D0680240

Autodesk Revit Architecture 2011 English:
0D364D4931B2181459212B07401B51A1

Autodesk Revit Structure 2011 English:
86335832DD22718409B4BD40DA9E0B8C

Autodesk Revit MEP 2011 English:
0653F13C70005594F95657BC748FD25B

Note

Product IDs for Revit 2012 Products will typically start with 0A4..... You can verify that it is the right key, or adapt to localized versions, by expanding HKEY_CLASSES_ROOT\Installer\Products\<Product ID> and checking the Product Name field.

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.