PortableUpdate

http://www.portableupdate.com/default.aspx
PortableUpdate is a tool for updating a Microsoft Windows® computer without the necessity to be connected to any network. This is useful in many circumstances:

When the computer reside on a secure Lan isolated from internet; When the computer to update doesn’t have access or can't use a proxy server; When is necessary to completely update a fresh-formatted computer with the last update before connect it to the network; When the computer doesn’t have an hardware network connection at all; When the network connection speed is too low or it is necessary to update the computer very speedily; In all the other cases when is mandatory to have the complete control on the whole updating process without connecting the computer to the network. ...but of course it works very well also if connected!

How it works?
To update a computer disconnected from internet, PortableUpdate use an external cache to store the updates.

• The cache can reside on any Usb external drive or, via Lan network, on a shared path. Once an update is copied to the cache (the only time that an internet connection is required!), the same update will be used for all computer that need that particular update.
• You'll never download twice the same update for update different computers or for updating many times the same computer. For example, consider that the dimension of one single update can reach 442 MB in size!
• When the update is stored into the PortableUpdate cache, the program will use the standard Windows® Update API services to update your computer.
• As result, you can see the log update in the standard Update History Log as it was done from the normal Windows® Update site!
• For any other technical information, please read the documentation page.