PCs need updates to accept Group Policy Preferences

Group Policy Preferences is a relatively new feature. Consequently, PCs or Servers that have not been updated may not pick up the preferences set on up-to-date administrative workstations.

For example: Suppose you wanted to apply registry settings to your 300 PCs across your site. You can use Group Policy preferences to do this very easily, even pulling the registry changes directly from the administrative workstation. However, some PCs do not appear to pick up the preferences. On closer inspection, they have not yet had the latest updates to Group Policy Preferences. This can happen if the PC was recently rebuilt and is awaiting the next update window.

After running Windows Update, check for the changes and, bingo, there they are...