My last shot at solving this one, and you'll need another PC with Word (97 or 2000) on it, as you need to get at the VBA editor.
First create a new Template file called FullScreen.DOT (or whatever, as long as it's a .DOT file). Save this to floppy disk.
Click on Tools | Macro | Macros, and in the Macro Name field, type AutoNew. Change the Macros In field to FullScreen.Dot. Then click the Create button. This creates an outline macro called Sub AutoNew() in your new Template file.
Now type (or copy) the following line under the Sub AutoNew() header:
ActiveWindow.View.FullScreen = False
So you end up with:
Sub AutoNew()
'Comments
'Comments
ActiveWindow.View.FullScreen = False
End Sub
Save your file. Bring the disk to your own machine, the one with the faulty Word on it. Using Windows Explorer, navigate to your PC's startup folder for Word 2000. On Windows 9x PCs this is usually C:\PROGRAM FILES\MICROSOFT OFFICE\OFFICE\STARTUP. On Windows 2000 PCs it'll probably be in C:\DOCUMENTS AND SETTINGS\[your username]\APPLICATION DATA\MICROSOFT\WORD\STARTUP.
Copy the FullScreen.DOT file from your disk to the Startup folder.
Now start Word. The Fullscreen.DOT template will open on Startup, and the Autonew macro will automatically run. If your version of Word is running in Fullscreen mode, the line of code you placed in the macro should turn Fullscreen off.
If it doesn't work, then your problem is something other than Word defaulting to Fullscreen mode.