Microsoft has a message for Windows users: Patch your computers quickly. On Tuesday, the software giant released a fix for a networking flaw that affects every computer running Windows NT, Windows 2000, Windows XP or Windows Server 2003. If left unpatched, the security hole could allow a worm to spread quickly throughout the Internet, causing an incident similar to the MSBlast attack last summer. Read more: CNet News. Useful links: TS' OS Updates | MS' Windows Update.