Windows 7 and My Documents. This is a strange one that we all have to get used to when we first begin using it.

Windows 7 doesn't have a My Documents set of folders any more. At least, not in the sense that we knew in XP and below.

Instead Win 7 has folders for Documents, Music, Pictures, and Videos. However, there are still what looks like My Documents, My Music, My Pictures and My Videos, but these act more like shortcuts to the new folders, and in fact are called Junction Points.

These Junction Points have been added to allow older software that still relies on the My Documents sets of folders to be installed correctly. But the files in them are similarly shortcuts and they cannot be manipulated.

So, have a look in Documents, and see if your spreadsheet file is there.

I hope that helps.