need help

Dell 14 inspiron series 7000, w8.1 SL
(1) first setup my notebook to boot on diagnostic startup (to check some software issue)
(2) i was asked to login, which i did, and windows accepted the password.
(3) user icon was displayed on the middle. and i waited, nothing happens.
(4) i tried to restart the system and tried it again ,,and again and same thing happens (nothing)

I wonder if i missed something ... i done diagnostic startup on w7 a lot .. but not experience this problem before.

by the way im new in using windows 8,, just bought the new laptop a couple of day ago.. home u guys can help

thank you very much!