Changing desktop and returning to original desk top cause Excel to "lose" menu bar and ribbon. Only solution to restore is to exit Excel (hoping any changes are saved) and restart. Environment is: HP i7-7700 16GB. Windows 10 Pro 64 bit, VirtuaWin 4.4, Excel for Office 365 (16.0.11328.20156) 32 bit. Any ideas why? Or how to restore menu bar (from which I would hope to be able restore ribbon, or at