First thing to try is go to Control Panel and then in the search box type "Add" then select the option "Add or remove programs". Once this window has populated it's list, find "Microsoft Office Ultimate 2007" or Professional (or whatever he has bought ) and then click Change. Another window will open with three options; Add or Remove Features, Repair, or Remove. First try selecting Repair, then click Continue. This should sort out any issues that Outlook is having with starting up.