Cannot delete itunes and others in Vista

Hello, Running a laptop with vista 32 bit premium ( i think ) Vista came
preinstalled. I am the owner administrator, and there are no other user
accounts on the machine. Trying to clean off some unused programs to create
some harddrive room and vista will not let me remove them. Trying to delete
itunes, quicktime, preinstalled games, and such , not system files or
components. When trying to delete from control panel, vista chugs along for
a little bit and come back and says I don't have permission to remove this
software, contact the system administrator. I went back and checked, and the
owner profile says it's an administrator. Went to msconfig and clicked
startup and took out itunes and quicktime from running at startup, rebooted
and I still can't remove it. Don't see an ininstall in the itunes menu
options, contacted gateway ( laptop manufacture ) and they were clueless. I
don't want to reformat the machine to get rid of this stuff, what next???

HELP!!!

Thanks, Bob