I suddenly have a situation where I can't open Excel, or open an Excel file, by clicking on the shortcut or file name. I see the "busy circle" for just a second, but nothing happens. No error message, just doesn't open. After some research I found that I can run Excel as administrator, and then navigate to the spreadsheet I want. So I have a workaround, but not very convenient. Just before this started, I was working with a sheet with some VBA which sets a password for the code, and some other things to try and secure the sheet. (It is a game where I need to hide things from users.) I had made some changes to this sheet, so I'm guessing something with that may have caused a problem? But I can't open ANY spreadsheet files. Thanks for any ideas!