Revision Note: Advisory published. Advisory Summary:Microsoft has issued this Security Advisory to clarify information of the issue addressed in Security Bulletin MS05-039 for non-default configurations of Windows XP Service Pack 1. This feature is known as “Simple File Sharing and ForceGuest.” If you are using Windows XP Service Pack 2, enabling Simple File Sharing and ForceGuest does not increase your level of exposure to the MS05-039 security vulnerability. Also, customers that have applied the security update included with MS05-039 are not impacted by this issue. We recommend that customers continue to follow our Protect Your PC guidance of enabling a firewall, getting software updates and installing anti-virus software. Customers can learn more about these steps by visiting the Protect Your PC Web site.

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