SFG wrote...
I upgraded from Windows Vista to Windows 7 and now when I am using Excel and
hit the tab key, the cursor always jumps to cell P rather than moving to the
adjacient cell to the right. *How do I correct this?

You have transition navigation keys enabled. In Excel 2003 and prior,
run the menu command Tools Options to display the Options dialog,
click on the Transition tab, uncheck the Transition navigation keys
checkbox, and click the OK button. For Excel 2007, it's buried
somewhere else, but the [Alt]+T, O key combination (hold down an [Alt]
key then type T, release the [Alt] key and type O -- that's the letter
between N and P, not zero) should display the Options dialog in Excel
2007 and 2010.