Vista Administrator Issues

I see I am not the only one with this pain. So it appears that per the
previous threads you can right click on a particular folder and change the
admin. I along with others, do not understand that if i am logged in, as the
admin, why cant i get rid og files i dont use or dont want and cannot remove
from the add/remove programs. Also after i have made that change to me for
two different folders, it gives me an error " an error occurred while making
sercurity changes etc" so after all that I can still not delete files like
MSN and Movie Maker to name a few of the files i want off this pc
pleaseeeeeeeeeeeeee help me shut these silly options off globally so i can
get my pc running the way i want it
thanks