Optional hotfix KB943729 (Group Policy Preference Client Side Extensions for Windows XP x64 Edition) is set for silent installation via svcpack by nLite.
However it still shows up on Windows update, any thoughts?
EDIT:
Further investigation reveals that nLite has nothing to do with this problem. I can manually execute the hotfix after Windows installation and it still shows up on Windows Update.
So it's either a flaw in the hotfix itself or an error in the Windows Update logic.