If you ever find yourself staring at a stubborn Windows 7 machine with high CPU, slow logons, or crashing Explorer – before you reinstall the OS, ask yourself: Did I install KB4023814?
Deep Dive into KB4023814: The "Optional" Update That Fixed Critical Performance Issues in Windows 7 & 8.1 kb4023814
June 27, 2017
Later cumulative rollups (specifically July 2017 preview rollup KB4025341 eventually absorbed its fixes). If you ever find yourself staring at a