Can not open website in wordpress

Is the site on a live server? If so, you don’t need anything installed on your local computer – it’s all done using a browser.

http://codex.wordpress.org/WordPress_Lessons

Are you logging in to the site via

http://example.com/wp-login.php

You’re not opening anything on your local computer – unless you’ve moved the site to your local installation of WP.

Yes – try another browser if IE is not working. What is the site URL?

Yes, if you cannot access the site, you cannot do anything to it. What is the problem?

Or are you wanting to work on it on your local computer? If so, you’d need to move a copy of the site to your computer –

http://codex.wordpress.org/Moving_WordPress

We have no info about a particular site login or any access to site files. Sounds like you’ll need to go back to him about this problem.