Wsus not updating all clients
Windows Server Update Services (WSUS) is one of the best solution for your all such worries.
If you are running a setup of at least 50 PCs then you sure must be knowing about WSUS already and if you not or thought that its too hard to implement then its about time to take note of it.
In part one of this series about Windows Server Update Services (WSUS) in Windows Server 2012, I described how to install the necessary prerequisite components for WSUS and how to carry out post-installation tasks.
Leave the default "Add to an existing Software Update Group".I setup a WSUS server in a test lab and the results of client machines registering themselves with the WSUS server were flaky; especially if they weren’t on the same domain as the WSUS server.One of my cloned machines was having trouble until I changed the SID with New SID from Microsoft.Sometimes we think that why are we downloading the same updates for each of the PC separately?Or feel that its really hard to keep track of what’s got updated and what’s not?
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First of all, you have to specify the rule of grouping the computers in the WSUS console (targeting).