This is an old revision of the document!
The following process applies to Rhino 4 and later (that includes Rhino 5, 6, 7.
During the startup, install or uninstall of Rhino, you get an error message like this:
The feature you are trying to use is on a network resource that is unavailable. Click OK to try again, or enter an alternate path to a folder containing the installation package '<filename>.MSI' in the box below.
The Windows Installer cache cannot find a file or registry key required for uninstall. This is a common problem caused by the Windows Installer Service. The best solution is to use Windows Install Clean Up to thoroughly remove the previous installation. After you clean up the previous install, you will be able to reinstall Rhino and get a valid install.
Manually remove Rhino and the Windows Installer registration for the product. You will need to have Administrator privileges on your computer to complete this.
You should only do the following procedures if uninstall fails from the Apps and Features.
Warning: The following procedure may result in registry corruption and a 1402 error next time you install software. Only follow these steps if the above procedure did not allow you to install Rhino.
If you followed these steps and then got a 1402 error, these instructions may resolve the 1402 error.