This update resolves the "Flaw in Digital Certificate Enrollment Component Allows Certificate Deletion" security vulnerability in Windows XP 64-bit Edition. Download now to stop a Web site or HTML e-mail from deleting digital certificates on your computer and preventing you from using the services they are associated with.

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 or Remove Programs.
3. Select Windows XP Hotfix (SP1) [See Q323172 for more information], and then click Change/Remove.