Need Help with this Error Message....

I just purchased Office X.v and installed it onto my Mac. I also
removed Office Test Drive before installing the full Office X.v, but i
didn't empty my trash. So after I installed the full version i keep
getting the error "An unexpected error occurred while trying to load
Microsoft Framework X library" on all office programs. I read on
mactopia that this could be caused by "lock" identities in the
microsoft identity file, but all of mine are unlocked. When i tried
to empty my trash, it would not empty a few microsoft file because it
says they are in use. Framework X is one of them. So what do i do
now? I thought about removing the full version and re-installing, but
I have the Student edition and am afraid that if I remove it I will
have to use another of my 3 Product Keys to reinstall and I don't want
to waste these. what should I do? Will removing office on my
computer and reinstalling it on the same computer count toward my 3
installs? I need help bad!!