Richard Siddaway's Blog

Windows Updates CIM classes

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When Windows 10 and Server 2016 were released they contained a new CIM namespace – ROOT/Microsoft/Windows/WindowsUpdate

This contained a CIM class MSFT_WUOperationsSession that had 2 very useful methods – ScanForUpdates and  ApplyApplicableUpdates.

These methods enabled you to find and install updates from the Windows Update site or a WSUS server if you’d configured the machine to use WSUS.

Best of all the CIM class could be accessed and used remotely which was a huge step forward over the old COM object that couldn’t be used remotely.

Things changed with Windows 10 Fall Creators Update (1709) and Windows Server 1709. MSFT_WUOperationsSession still exists but the methods you need to scan for updates and apply updates are now on the MSFT_WUOperations class. The great thing is that they’re static methods so using them is easier. The bad – no really, really bad – thing is that this class CAN’T BE ACCESSED REMOTELY through a Windows remoting session,  a CIM session or a SSH remoting session.

This takes us back to the bad old days of using COM objects. There doesn’t seem to be any reason or explanation for this decision.

I have managed to use the class remotely through a PowerShell direct remoting session though which means that I can force updates in my lab. Its not really an answer for production though

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