Hi All, I have an Excel file, which I developed this week. I tried to shut down the computer, which thought window 2 of the file was open. I saved the file, having made a copy in explorer and renamed it. Now any version of that file opens as the xlsx:2 version only. I have no window 1 open, when I open a new window, it calls it xlsx:3.. It worries me in case there is some instability in this file or corruption. Any ideas pls.. Its got a lot of stuff going on, so I don't really want to rebuild it from scratch - next I'm going to export all the worksheets to a new file. Thanks J