The possibilities are, for example, to completely block the computer leaving the screen black. To go back to using the computer, the user will have to enter a previously established password.
Other options are to disable the use of the task manager or certain system folders from where they can do certain damage to the operating system. Something really useful if you leave the computer into the hands of a child.
Access Manager is a complete application that has as much utilities as users that want to download them. Its high number of benefits and easiness to use convert it into a suitable tool for any user.