Linda,
WOW
I hope that you have some computer skills because you are going to need them....

You are going to have to go through a manual process of gettting the Micosoft rogue/ware off your computer. I call it this because it is the same principle that rogueware/scareware uses to install their products. In which they don't want you to be able to just simply remove them. And to have Microsoft use these tactics for trial versions is just unacceptable.

How to uninstall the 2007 Office system if you cannot uninstall it by using the "Add or Remove Programs" feature

Go there and PRINT the page so as to have the information in hardcopy form in case your computer needs to be shut down during the uninstallation process. This is pretty lengthy and I wish you luck on ridding yourself of this program.