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.
Mark
I have an old excel document (I am now using Office 2010 on Win7) that I "saved as" a document with a new name in my My Documents folder.
Now I can't find the document.
If I go to search and type in the name, I can pull it up and open it. I checked the properties and it says that it is in the My Documents folder, but is still not visible in the folder itself.
I am sure there is something simple that I have overlooked, but does anyone have any ideas???
Thanks in advance for any help you can offer!

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic