windows Installer - uninstalling previous version when the versions differ in installation policy (per-user, per-machine)

Question

We have a visio plugin (say, version 1) which was installed by the User with Admin rights as per-user (‘Just me’ otpion) and the msi installer was created using setup and de

Answer 1

It's not just a Visual Studio problem. Windows Installer doesn't allow the installation context (user/machine) to change durin an upgrade. You have to perform logon as the user profile(s) that did the installation(s) and remove them before installing the new per-machine install.