Open Group Policy Management from the tools menu.
Right click on Group Policy Objects and select Backup all
Select a place to backup the group policy objects and give a description.
and click Back Up
Restoring Group Policies
If I accidentally delete my desktop policy and I want to restore it. I would right click inside the group policy management view pane and select manage backups.
Find the desktop group policy and click restore.
and now desktop reappears in the list of Group Policy Objects.