http://isc.sans.org/diary.php?storyid=1939
Heise brings us "Offline Update 3.0
<http://www.heise.de/ct/ftp/projekte/offlineupdate/ctupdate302.zip> " to do
offline installations of Microsoft patches.
Read more about it at: http://www.heise-security.co.uk/articles/80682
Now this is a great concept. You can actually make a DVD to install the patches
before you connect a PC (that's out of date on patches) to the Internet. If you
think you can safely do that without this tool, take a second and think it
through knowing that some of your friends needing a house call might have a USB
connected DSL or cable modem and therefore not be using NAT, next take a look
at the survival time <http://isc.sans.org/survivalhistory.php> and think how
long it takes to get a windows system from original media to a fully patched
status.
So, if you're going to visit parents, family or friends over the holidays,
start your preparation now and make that disk today to take along. It'll
improve the obligatory "Could you take a look at our computer while you're
here?" response time dramatically and gives you a safe way to reinstall systems
without a hardware based firewall.
If you have networks that you do not want to connect to the Internet cause the
risks involved of doing that are just too big for the sensitivity of the
involved data this might also become a way to patch those off-line machines.
Update: Simon wrote in mentioning AutoPatcher <http://www.autopatcher.com/> as
an alternative solution.