I have this odd problem with Excel 2007.
When I open the excel 2007 blank or with data it won't let me select any cell; only the cell 1 is selected. It's not frozen; it just won't let me select anything.
If I remove the graphics drivers it starts working, but when I install the drivers again the next day the same problem occurs. Also, if I change the screen size in Excel to 90% then it starts working again.
I have completley removed office 2007 and run ccleaner to remove invalid registry entries, but still the same problem.
PC Details: Win Xp Pro SP3, Office 2007 Pro