What do you mean when you say "installed a new account?" Did you reinstall Mac OS X with the discs that came with your Mac, or did you create a new user account in the Accounts pane in System Preferences?
Can you post a screenshot of these dialog boxes?
To post a screenshot, hit Shift-Cmd-4 at the same time, and your mouse will turn to a crosshair. Then hit the space bar, the crosshair will turn to a camera. Then click the camera on the dialog box you want to show us. There will be new .png files on your desktop named Picture 1, Picture 2, etc...
To put the pictures on the internet, go to
http://www.imgur.com/, click "choose file" and navigate to the pictures. (They'll be on the desktop.) Then click continue, and your picture will upload to imgur. imgur will give you a link to your picture when it's done uploading, you can post that link here so we can see what's going on.
A picture of the "get info" window for your hard drive would also be helpful.