Seen these questions forever. Used personal same workbooks with macros (10k+ lines of code) for years. Starting about 15-Dec-19, opening workbooks appears to open a Funcres workbook as a precursor. Yes, this issue has happened before... Tried adding/removing add-ins. Seems a mutually exclusive problem - the combination of "Analysis ToolPak - VBA" and "Solver Add-in". Both of which have existed for years. Individually today, either appears okay, but in combination fails (opening multiple windows and/or other issues). I'm experiencing a double window opening failure when combining these two add-ins. Have done the standard cleaning issues and whatnot. How do I address this issue?