If you have permission to log on to the system, then when you need to run a program that has higher privileges to run, you need to log off the current user and log on to the system with a highly privileged user account. We don't need to do this in a professional version of Windows XP, and we can use "run as" to run a single program with a high privilege account.
On the desktop or My computer, right-click on the program icon and choose Run mode. In the pop-up page (shown in Figure 1), select the "following user" radio button, and then enter a user account with a high privilege in the username, and then enter the appropriate password. This allows us to run the application with the new input.
Figure 1 Selecting a Run identity
If you need an application that always asks which user to run at run time, then set it up with the following steps. Right-click on the application icon, select "Properties" from the pop-up menu, and select "Advanced" in the pop-up dialog box. Eject the page shown in Figure 2.
Figure 2 Running as a different user
On the page shown in Figure 2, click "OK" before "Run as other user". Now every time you run the program, you will be asked which user you are running as.