Yes it is. If you search Microsoft you will find the updates in download areas designed for system administrators. You can download these and copy them to a CD.
This web site also posts the updates, but it takes them a few days to get them.
http://www.softwarepatch.com/windows/
But, if you are not conected to the internet, you should not worry too much about it because almost all of the updates have to do with security issues, which don't affect you.
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