I have done a System Restore on some XP PC's we have at work and it fixed it. This was done prior to learning about the .exd file fix.
BUT I have tried all of the above fixes on the Windows 7 computers with Office 2007 on them without any luck.
I am running Windows 7 32 bit, Office 2007, and a Windows 7 64 bit, Office 2007
On the 2 Win 7 Computers:
I have tried deleting the .exd files.
I have tried uninstalling the updates (also KB2596927 for the Office 2007 update)
(in a "dos" screen Type cmd.exe, then type "wusa /uninstall /kb:2596927"), but it errors when you try.
I have tried a system restore, but it won't restore to an earlier date.
Would love to find a fix, as we use Excel heavily on a daily basis, and cannot work at the moment!
Thanks.