The gpupdate command refreshes local and Active Directory–based Group Policy settings, including security settings on the computer from where it is run. You can use gpupdate locally on computers with XP or higher to refresh policy immediately. On computers running Windows 2000, this functionality is provided by the using the secedit command with the refreshpolicy option.

To refresh Group Policy settings with GPUpdate

gpupdate [/target:{computer|user}] [/force] [/wait:value] [/logoff] [/boot]

Force a policy update on local computer

gpupdate /force