Excel 2007 : Problem after installing Office SP

Hello, I tried searching, but am incapable of finding the right combination of keywords for this. I did some upgrades on an XPPro computer with Office 2007 installed. One of those upgrades was a service pack for Office. Now when I open spreadsheets that previously used to display 12 columns, they only display 11, which is annoying, but not insurmountable, or wouldn't be, except for the fact that Excel will not allow me to scroll to the right to see the columns that are off the page. Is there a setting I need to change? How do I get it back to the way it used to be?
Thank you for any help you can give.

Originally Posted by Paul

Hi Mid_Life_Crisis, welcome to the forum.
Without seeing your workbook, can't say for sure.

Thank you for the response. The computer in question is at home. It is actually my wife's computer, she uses it for work and is not happy that I did the update that caused all this. I'll check it tonight and respond with what I find then.