What's the Microsoft Windows Security Update CD?

A. Microsoft has released a CD-ROM that includes all service packs and fixes for the following OSs:

The CD-ROM is free (including the cost of postage for US-based customers), and you don't need to provide a credit card when you place your order. You'll actually receive two CD-ROMs in the mail--the first has all the fixes, and the second has trial antivirus and firewall products.