Active Directory requires that computer accounts be created for both Windows 2000 and Windows NT-based operating systems. Similar to NT 4, Windows 9x-based systems do not require this, on account on the fact that these systems do not have a SID. Computer accounts can be created in the built-in Computers container or other containers in advance. If you create the computer account as part of joining a domain, the account will automatically be placed in the Computers container. Of course, it can be moved at any time, according to your management and administration needs.