General Installation: Cannot Uninstall and/or Reinstall

I have used this workflow many times with customers if there is a problematic installation.  I would always backup the Registry keys if you plan to delete them!

http://beingcivil.typepad.com/my_weblog/2011/07/cannot-uninstall-andor-reinstall.html

The main Autodesk installation files/registry keys are located in 3 places  the registry:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Installer\UserData\S-1-5-18\Products

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall

This is the sample key (folder) you would delete for Revit 2011 x64:

The Autodesk hotfix/updates installation files/registry keys are located in the registry here:

HKEY_CLASSES_ROOT\Installer\Products

Thanks to Almas Suljevic for this great tip.