HOW DO I DISABLE NUA.EXE, IT'S KILLING MY CPU AND MAKING IT RUN 100%

HELLO, I WOULD LIKE SOME ADVISE ON HOW TO DISABLE THE NUA.EXE

ON MY NIS. AT TIMES, IT IS TAKING UP 100% OF MY CPU AND IT JUST SUDDENLY

APPEARED IN MY RUNNING PROCESS ONE DAY.  NOW I AM UNABLE TO DISABLE IT

AS IT SAYS "ACCESS DENIED".  JUST A SIDE NOTE...PEOPLE REALLY DON'T LIKE

TO SEE SURPRISES IN THEIR PROGRAMS. ESPECIALLY WHEN IT IS TAKING

OVER THE WHOLE SYSTEM. PLEASE ADVISE, THANK YOU.