Hi,
Follow these steps and check.
a. Click on****Start button and type Edit Group Policy in the Start search box and press Enter.
b. In the left pane, click on to expand User Configuration, Administrative Templates, Control Panel, and Personalization.
c. In the right pane, right click on Enable screen saver and click on Edit.
d. To Enable Screen Saver select either Not Configured or Enabled.
**Note:**Not Configured is the default setting.