Configuring Fast User Switching in Windows XP !!

Fast User Switching, a feature that made its first appearance in Windows XP, allows multiple users to be logged on to a computer at the same time. As the feature name suggests, you can quickly switch among users. This might be convenient, for example, if one user logs on, opens several documents, and begins downloading a huge file from the Internet. Meanwhile, another user comes along and wants to quickly check e-mail. With Fast User Switching enabled, it’s no problem. The second user can log on, log off, and return control to the first user. While the second user is logged on, the first user’s applications (such as the download process) continue to run. To switch to another user account, press the Windows logo key+L. This displays the Welcome screen, from which the second user can click his or her name and enter a password, if required.

Fast User Switching won’t work in every situation. To enable the feature you must observe the following requirements:
● The Welcome screen must be enabled.
● The computer must not be joined to a domain.
● Offline files must be disabled.
● Although it’s not an absolute requirement, the computer should have more than 64 MB of memory. By default, Fast User Switching is disabled on computers that have only 64 MB. (In any case, to run Windows XP effectively, you should have at least 128 MB.)

NOTE : If your keyboard doesn’t have a Windows logo key (or you prefer using the mouse), you can get to the Welcome screen by clicking Start, Log Off. In the Log Off Windows dialog box, click Switch User.