Microsoft just releases and official ‘Update Pack’ for Windows 7, which contain all Windows 7 updates from the past as announced here. This rollup pack is called “Convenience Rollup” but is similar like to a service pack.
According to some Microsoft comments in the Technet forum, the reason why the rollup pack is called “Convenience Rollup” is due to the issue that a real service pack will change the support lifetime from the Windows 7 product (for more infos see this link here).
If a administrator with to integrate the “Convenience Rollup” in a fresh new Windows 7 SP1 image (as explained here), then he need to integrate KB 3020369 as well!
If you get a error message while you apply the Convenience Rollup to your WMI image, try to unmount and remount your image after you integrated KB 3020369.
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Update:
KB 3020369 is now replaced with KB3177467 (download here)