I am haveing an issue with a users who has created a number of spreadsheet in Excel 2003. I upgraded her to Office 2010, and did all the service paks (I think). When she opens an ".xls" sheet it opens with "read only"...the error message specifies that the file is open by "" (a blank user???". The only work around I have found is to "save-as" a 2010 Excel spreadsheet. Is ther something I am missing or is there a real solution to this problem. Thanks in advance for your reply.