Hi, we migrate our installers to ADV INST and in order to accomplish our requirements we need to upgrade from the previous version installations to the new ADVINST, our old product was fully tested, complies with MSI standards and it works fine in all scenarios.
In the new ADVINS project we added the UpgradeCode to do an automatic upgrade (using both MSI & EXE), what happens it that it seems that when uninstalling the previous installer (while updating) a message is displayed stating that there's an error since the installer has not enough permissions (the previous installer had administrative permissions to install per machine) and after clicking "ok" the upgrade process continues fine. The behavior is not inclusive of just one project but another 5 different ones as well.
This problem does not happen when we launch the ADV INST installer from an Administrator terminal therefore we believe there's an issue in the UI side.