David Installs Software Update Services on a Computer Named S3

Multiple Choice

David installs Software Update Services on a computer named S3. He creates a Group Policy object that configures all client computers to receive software updates from S3. Later, David runs MBSA on all client computers to check if all updates are applied. David discovers that all the Windows 2000 Professional client computers received updates, but Windows XP Professional client computers did not.
David verifies that the GPO setting was applied on all Windows XP Professional computers. What should David do to ensure that the Windows XP Professional client computers receive their updates from S3?

A) Migrate all users of the Windows XP Professional client computers to the Administrators local group.
B) Restart Automatic Updates on all Windows XP Professional client computers.
C) Delete the NoAutoUpdate value under HKEY_LOCAL_MACHINE \SOFTWARE\Policies \Microsoft\ Windows \ WindowsUpdate\AU on all Windows XP Professional client computers.
D) Install Service Pack 1 (SP1) on all Windows XP Professional client computers.