If anyone experienced problems after updating to Zoom version 5.7.7, Zoom released 5.7.8, which seems to fix all the crazies that happened after the .7 update. Issues ran the gamut from freezing, random blocks of various colors appearing on the screen, unable to control anything within the Zoom environment, including leaving the meeting. The latest release came on Friday, 9/10. From what I and others experienced, this seemed to affect PC users. 
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Alan Katsura
akatsura@...
Moderator HLAA Tech Group