Could you answer a few questions:
1) Did you install SSMS 17.8.1 on a clean machine, i.e. without any previous version of SSMS 17.x on it?
2) If not, did you upgrade by installing the Full install package or the Upgrade install package?
3) If you upgraded, what version you had before the upgrade?
4) Could you zip up the TEMP\SSMSSetup folder and share it with us?
Finally: did you try to uninstall SSMS and reinstall it? Did it change anything?Gavin Paolucci-Kleinow supported this idea ·