Article ID: 900910
When you try to run the System File Checker tool (Sfc.exe) on a Microsoft Windows XP Service Pack 2 (SP2)-based computer, you may be prompted to insert the Windows XP SP2 CD. However, the System File Checker does not accept either the Windows XP SP2 CD or the original Windows XP CD.
Note You can install Windows XP SP2 either from the Windows XP SP2 CD or by downloading the SP2 files. To download the SP2 files, visit the following Microsoft Web site:
This problem occurs because the System File Checker must verify the SP2 files against the originally installed files. However, the System File Checker does not recognize the Windows XP SP2 CD or the Windows XP CD.
To resolve the problem, use one of the following methods.
Method 1: Insert a Windows XP CD that has SP2 integratedFor more information about how to integrate software updates into Windows installation source files, click the following article number to view the article in the Microsoft Knowledge Base:
(http://support.microsoft.com/kb/828930/ )How to integrate software updates into your Windows installation source files
Method 2: Modify the registry to point to the Windows XP SP2 Setup filesImportant This section, method, or task contains steps that tell you how to modify the registry. However, serious problems might occur if you modify the registry incorrectly. Therefore, make sure that you follow these steps carefully. For added protection, back up the registry before you modify it. Then, you can restore the registry if a problem occurs. For more information about how to back up and restore the registry, click the following article number to view the article in the Microsoft Knowledge Base:
(http://support.microsoft.com/kb/322756/ )How to back up and restore the registry in Windows
Steps to reproduce the problem
For more information, click the following article number to view the article in the Microsoft Knowledge Base:
(http://support.microsoft.com/kb/897128/ )You may be prompted to insert a Windows XP Professional CD when you run the System File Checker tool in Windows XP Home Edition
(http://support.microsoft.com/kb/885522/ )System File Checker does not accept a network location that contains the installer CD when you use the scannow switch in Windows XP SP2 or in Windows Server 2003