Possible Duplicate:
Disabling UAC programmatically
How can I change never notify in ‘user account control settings’ by c#?
by manual :
User Accounts -> user account control settings -> change by scall bar to ‘never notify’.
(I need it for automated integration tests )
As an Administrator you could change the appropriate registry key using C#:
Have a look at this answer: https://superuser.com/questions/83677/disabling-uac-on-windows-7/83678#83678