Best Office Software reviews

I just bought a new computer and with the computer came microsoft office trial version. I want to uninstall this program because I already have a Microsoft office home and student 2007 on a disk for download. I tried to go to control settings and uninstall and I got a message that I do not have administrative priveledges for this uninstall. Can someone tell me how I can uninstall so I can install my own software without any conflicting programs running at the same time?