Unwanted UAC actions

It seems that UAC has imposed limitations I did not want and did not request
and cannot live with. For some unknown reason I can no longer copy an
address in the MSIE address bar. I can no longer set time or get the
internet update of time to operate. I have turned off all UAC controls
(supposedly, and I get the error message saying I have done so), but
functions are still not returned to me. My login says that I am logged in as
adminstrator (as I have been), but many functions are now restricted. Two
questions: (1) how do I get rid of these &@#$ restrictions?; and (2) how do
I prevent this from re-happening?

Thanks