Thursday 8 March 2018

Windows Server 2012 R2 & 2016 updates showing as not applicable

Due to Spectre and Meltdown patches causing problems with various anti virus vendors, Microsoft has added a registry key check for ALL patches on Windows Server for January and February 2018 (not just the Spectre and Meltdown patches)

If you find yourself in the situation where your severs are not detecting the latest update rollups then check this Microsoft post:

Most AV vendors are properly setting this flag in the registry, but some will not and if you have some servers which do not have AV for legitimate reasons you may find yourself unable to patch these machines.

The server will simply not show the update rollups from WSUS or Microsoft Update servers. In WSUS, they will show as 'not applicable' for the server.

Setting the flag resolves the issue, but unless you are checking that servers are getting updated properly this may not be noticed. In WSUS, since the updates are not applicable, the server will show as fully patched, not requiring the updates which is a bad situation to be in.

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