Quote:Users are now reporting issues with Windows 10 cumulative update KB4493509, which was published on April 9 as the Patch Tuesday release for version 1809 (October 2018 Update).
 
While Microsoft has only acknowledged two different issues in this cumulative update, I’m seeing various reports of substantial PC slowdowns, freezes, and system hangs after installing KB4493509.
 
Several Windows 10 users complain that this cumulative update made their computers unresponsive especially on the first boot after the install. Others say they experience occasional freezes, with certain features like the right-click context menu on the desktop apparently broken down.
 
A post on Microsoft Community forums, as well as several messages on TenForums indicate that KB4493509 sometimes causes occasional freezes despite a seemingly successful installation.