Joining the domain after installing windows 8

1. add your pc into the company's domain.
a. Control panel -> System and Security -> system ->
b. In the row of "Computer name, domain, and workgroup settings -> change settings
c. in System properties dialog, click on Change.. button.
d. enter your pc name and domain name
e. enter your account name and password to that domain.Then you are done! :)

2. Log- in with the user in your company's domain.
a. in log in screen, click on the arrow, (indicating you are loggin in using the user of the domain.)
b. enter the username/ password of the domain.