Enforce a system lock (screen saver lock)after a defined interval
It is possible to enforce a system lock after a defined interval. This requires the following two policy settings:
• Password protect the screen saver
• Screen saver timeout
using group policy preferences power plan is not a solution here ,as it is workgroup.
Local Group Policy Object (LGPO) that you can use to lock down settings on that machine. And if you have admin privileges on every machine in your workgroup, you can configure the LGPOs for your machines remotely from a single machine instead of having to walk around to each of them and log on locally.
To configure the LGPO on a remote machine, open a new MMC console, add the Group Policy snap-in, and click Browse to set the focus to a different machine than the local computer.
Group Policy under/User Configuration/Administrative Templates/Control Panel/Display
Click “Start.” Type “Gpedit.msc” into the search box at the bottom of the Start menu. Press “Enter.”
Click “Yes” in the User Account Control prompt window, if one appears.
Navigate to the “User Configuration\Administrative Templates\Control Panel\Personalization” folder in the left pane of the Group Policy window.
Double-click the “Password Protect the Screen Saver” setting in the right pane of the Group Policy Editor window.
Click “Enabled.” Click “OK.”
Double-click the “Screen Saver Timeout” setting in the right pane.
Type the number of seconds you want to lock the PC after into the “Seconds” box. For example, type “600” if you want to lock the PC after 10 minutes.
The setting for the screensaver is in the path HKCU\ControlPanel\Desktop\ScreenSaveActive – a value of 0 switches off the Screensaver, while the value 1 turns it on.the screensaver is activated and is switches on after 10 minutes.