Windows XP Pro: The Missing Manual

If you weren't able to add your computer to a corporate domain network earlier in the installation process, the Network Identification Wizard appears at this point to give you another shot at it. It's not an especially self-explanatory process; in fact, most of the questions this wizard poses are best answered by your network administrator. After all, adding PCs to network domains wasn't in your job description.

(Besides, you can always join the domain later, following the instructions in Chapter 19.)