Upon further investigation the options to uninstall, change or repair are not all offered for all the programs. For instance, itunes has all three when I highlight that program while Microsoft Office only offers to uninstall but not repair or change. I think I may go back a couple months and reset the computer to an earlier date. At this point I just want to fix this inconvenience...I'll probably never figure out what happened. I'll make an entry as to whether that fixes things. Thanks for your suggestion!