I run a WSUS server pushing out updates including the daylight savings update. to all computers on my network. How come some updates are installed and some aren't?

Q: I run a WSUS server pushing out updates including the daylight savings update. to all computers on my network. How come some updates are installed and some aren't.
A: Are you getting errors or does WSUS show it's working but the patch doesn't get installed? I've seen cases where the patch is installed but doesn't show up under add/remove programs in the control panel. The first thing I would check is whether or not the patch is installed.