If you try to run Setup for Office XP or Publisher 2002, you may receive an error message similar to the following
Error 25506. Microsoft program requires updated system files not detected on your computer. You must install the Microsoft Office 2002 System Files Update prior to installing program. C:\Windows\System\Riched20.dll is version 5.30.22.2300 when we require version 5.30.23.1200.
where program is the program that you are trying to install.
This problem may occur if the Riched20.dll file is damaged, if the Riched20.dll file is the wrong version, or if the Riched20.dll file is missing from your computer.
Rename the Riched20.dll file. To do this, follow the steps for your version of Microsoft Windows. This file may be hidden. For instructions about how to unhide files, see your operating system documentation. If you do not find the file, go to step 2.
Microsoft Windows 98 or Microsoft Windows NT 4.0:
Quit all Windows programs.
Click Start, point to Find, and then click Files or Folders.
In the Named box, type Riched20.dll.
In the Look in box, select your local hard disk.
Click Find Now to search for the file.
For each occurrence of the Riched20.dll file that appears in the Find program, right-click the file. Click Rename on the shortcut menu. Give the file a new name, such as Riched20.old, and then press ENTER.
-or-
Microsoft Windows Millennium Edition (Me) or Microsoft Windows 2000:
Quit all Windows programs.
Click Start, point to Search, and then click For Files or Folders.
In the Search for files or folders named box, type Riched20.dll.
In the Look in box, select your local hard disk.
Click Search Now to search for the file.
For each occurrence of the Riched20.dll file that appears in the Search Results dialog box, right-click the file. Click Rename on the shortcut menu. Give the file a new name, such as Riched20.old, and then press ENTER.
On the File menu, click Close to quit the Search program.
-or-
Microsoft Windows XP:
Quit all Windows programs.
Click Start and then click Search.
Under What do you want to search for, click All files and folders.
In the All or part of the file name box, type Riched20.dll.
In the Look in box, select your local hard disk.
Click Search to search for the file.
For each occurrence of the Riched20.dll file that appears in the Search Results dialog box, right-click the file. Click Rename on the shortcut menu. Give the file a new name, such as Riched20.old, and then press ENTER.
On the File menu, click Close to quit the Search Results program.
Insert your Microsoft program CD-ROM into your CD-ROM drive or DVD-ROM drive.
In Windows Explorer (right-click Start and then click Explore), go to the root of your CD-ROM.
If you are using Windows 98 or Windows Me, double-click Instmsi.exe. If you are using Windows NT 4.0, Windows 2000, or Windows XP, double-click Instmsiw.exe.
Click OK to the message that advises you that the Windows Installer installed successfully.