Acronis OS Selector should not ask for the password on startup after a machine is set to hibernation
Acronis OS Selector is skipped on the startup if the hibernation file is detected. This is because of the peculiarities of Windows boot up from the hibernation state. Acronis OS Selector was designed to write logs on the hard disk every time it is started and this can corrupt the hibernation state of the Windows operating system.
For information of how to use Acronis OS Selector to limit access to one machine please see Using Acronis OS Selector to Limit Several Users' Access to Software on the Machine.