Group Policy is not working in Some systems in a domain

Try the following:
gpupdate /force.
If that does nnot work try the following:
log in as Admin
Click Start, click Run, type gpedit.msc, and then click OK.
Double-click Computer Configuration, and then double-click Administrative Templates.
Double-click System, and then double-click Group Policy to display the group policies.
Depending on the type of computer from which you making this change, double-click Group Policy refresh interval for computers to make this change for workstations or for member servers. Or, double-click Group Policy refresh interval for domain controllers.
Click Enable in Group Policy refresh interval for computers so that you can modify the refresh and offset intervals settings on the Policy tab. Optionally, the administrator can enable Disable background refresh of group policy.
Click OK, and then close the Computer Management snap-in. restart the machine..