The screenshots below are what you might see when you log in to your computer. Depending on how your computer is setup, you might see other domain names displayed. However, the domain you need to log in to is the UAB domain. As you can see, in Windows XP you have a Log on to field where you can choose the UAB domain. In Windows 7, you have to type UAB\ to choose the domain to which you want to log in. Normally, you would see what domain you are logging in to. If you do not see UAB, you will most likely not be logging in to the UAB domain.
NOTE: The login prompts will differ slightly in different versions of Windows.