Once again, I manually removed Revit 2020, reinstalled it, then applied all patches up to 2.6, but NOT 2.7. Shortly after that first incident, three other users applied the 2.7 update, each of which resulted in Revit 2020 failing to open. At that point, I issued a company-wide directive to users of Revit 2020 to NOT install the 2.7 patch until Autodesk comes up with a solution.