This update resolves the "Malicious SMTP Client Can Send Malformed Command to Windows SMTP Service" security vulnerability in Windows XP, and is discussed in Microsoft Security Bulletin MS02-012. Download now to help prevent a malicious user from launching a denial of service (DoS) attack via the SMTP (Simple Mail Transport Protocol) service.

For more information about this vulnerability, read the associated Microsoft Security Bulletin. (This site may be in English.)

1. Click Start and then click Control Panel.
2. Click Add/Remove Programs.
3. Select Windows XP Hotfix (SP1) [See Q313450 for more information], and then click Add/Remove.