Summary: How to fix the installation Error 1327 - Invalid Drive.
Related installation help: Troubleshooting Rhino 5 Installation
I get “Error 1327. Invalid Drive (E:, F:, etc)” when installing.
Your user account has settings indicating that you should use one or more non-existent drives for special folders such as My Documents.
Note: This method, or task, contains steps that tell you how to change the registry. But serious problems might occur if you change the registry incorrectly. So, follow these steps carefully. For added protection, back up the registry before you change it. Then you can restore the registry if a problem occurs. For more information about how to back up and restore the registry, click the following article number to view the article in the Microsoft Knowledge Base: How to back up and restore the registry in Windows