Coming back to programing again. Attempting to update to 2.2.1. I have admin rights on my machine. When I run and select "anyone who uses this computer (all users)" option, I get a splash screen with "do you want this app to make changes to your device". The only option is No. No where to enter the admin password, no option to select "Yes". If this install has to be done for each user, why ask?
While I could be off the mark, what are your UAC settings? And have you tried running the installer as administrator?