Even with admin account windows 8.1 gives Access Denied

Im using Windows 8 for very first time & I installed & activated windows 8.1 pro. & created Administrator local account but still windows 8.1 gives me access denied for most of the task (even for editing text file i have to run notepad as admin by right click option & open the file from notepad) how can i get rid of that annoying "access denied" popup in main Login ID. Some time internet connection get 651 error.

OS - Windows 8.1 Pro x64

note - I turned off UAC by pulling slider all the way down at the very first boot.