The Trend Micro Password Manager can only be installed in one Operating System, even if you have multiple partitions, those are still under one OS. However, there is an option to move the installation to your second drive if that interest you.
Don't hesitate to message us if you need further help.
Thank you for the answer. I uninstalled Password Manager from that partition. Now P.M. is no longer present on the computer, however, I can not install it in the other partition. The installation is interrupted because: "It's already installed". But P.M. is not there, it is not found by the Windows 10 uninstaller. Ciao, Giuseppe.