Because I didn't plan to use the IIS function when I installed the system, the installation version was Windows 2003 Server R2 SP2. When I installed the IIS component, a pop-up window asked for the file on Service Pack 2 CD-Rom, and load Windows 2003 Server R2 CD2. It still doesn't work. What's going on? I saw G:\i386 displayed below the pop-up window. This i386 is usually on the system installation disk CD1, so I switched to Windows 2003 Server R2 CD1, and selected the i386 directory to find the file. The following prompt was done as usual and successfully solved!