I have an xlsm spreadsheet that I created. Sometimes when I go to open the spreadsheet it will say "File Conversion In Progress" and open the spreadsheet with a different name and a .xls ending. What would cause my file to not open correctly? I've noticed this on a different file with the .xlsm extension and it was on an entirely different computer. This is on Excel version 2016 and also 2010. Later if I go back to the file it will open correctly.