Check if patch is installed - Many VM vs Many KB

This PowerShell script helps to check if specific Microsoft patches are installed on a computer or not. This is very handy when handling multiple domains and a large number of servers. If there is a zero-day patch released, this leverages the admin's to quick audit the fleet.

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Windows Update
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Verified on the following platforms
Windows 10 Yes
Windows Server 2012 Yes
Windows Server 2012 R2 Yes
Windows Server 2008 R2 Yes
Windows Server 2008 Yes
Windows Server 2003 Yes
Windows Server 2016 Yes
Windows 8 Yes
Windows 7 Yes
Windows Vista No
Windows XP No
Windows 2000 No
This script is tested on these platforms by the author. It is likely to work on other platforms as well. If you try it and find that it works on another platform, please add a note to the script discussion to let others know.