Cant delete unwanted microsoft applications

Im an administrator on my pc and i cant get rid of prgram files that i dont
want, such as update services and others. i says that access is denied and i
dont have the correct permission levels. Ive tried changing my access rights
but when i allow my account full control instead of just read and execute
abilities it does not save these changes and still wont allow me to delete
the unwanted programs. How do i change this so that i have full control and i
am able to delete anything with out being told i dont have the correct
permisions?