When you use the System File Checker tool (Sfc.exe) on a Microsoft Windows XP Home Edition-based computer, you may be prompted to insert one of the following:

•	CD 1 from the Microsoft Windows XP Professional CD package
•	The Windows XP Service Pack 1 CD
•	The Windows XP Service Pack 2 CD

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This issue occurs when the following .inf files contain an incorrect source media description:

•	Fp40ext.inf
•	Ims.inf

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To work around this issue, you must change the source media description in both the Fp40ext.inf and Ims.inf files. To do this, use the following procedures.

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Back up the Fp40ext.inf and Ims.inf files

1.	In Windows Explorer, click Folder options on the Tools menu.
2.	Click the View tab.
3.	Under Hidden files and folders, click Show all files and folders.
4.	Open the C:\Windows\Inf folder.
5.	Click the Fp40ext.inf file, click Edit, and then click Copy.
6.	On the Edit menu, click Paste. This creates a copy of the Fp40ext.inf file that is named Copy of Fp40ext.inf.
7.	Repeat steps 5 and 6 for the Ims.inf file.

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Modify the Fp40ext.inf and Ims.inf files

1.	Open the Fp40ext.inf file in Notepad. The Fp40ext.inf file is located in the C:\Windows\inf folder.
2.	Locate the line that contains the following text: [Strings]
3.	Locate each line that contains the word "Professional."
4.	Delete each instance of "Professional" and replace each instance with "Home."
5.	Save and close the Fp40ext.inf file.
6.	Open the Ims.inf file in Notepad. The Ims.inf file is located in the C:\Windows\inf folder.
7.	Locate the line that contains the following text: [Strings]
8.	Locate each line that contains the word "Professional."
9.	Delete each instance of "Professional" and replace each instance with "Home."
10.	Save and close the Ims.inf file.
11.	Quit Notepad.

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Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.

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