Enable Auto Lock via group policy and registry

Via Registry Editor:

1. Open Regedit.

2. To enable autolock Modify the data of the values on the location "[HKEY_CURRENT_USER\Control Panel\Desktop]" as,

     "ScreenSaveActive"="1"

     "ScreenSaveTimeOut"="60"

     "ScreenSaverIsSecure"="1"

Via Group policy:

1. Open gpedit.msc through run.

2. Do the following changes on the location "user configuration>Administrative templates>personalization>

     enable Screensaver

     Password protect the Screensaver

     Screensaver timeout "