Next time a vendor tells you to upgrade his software, ask youself if you even need the software -- never mind the upgrade. The US Navy did. Check out the aircraft and bomb databases described in The Nimitz Goes To Home Depot by Kevin Meyer.
He told us he was offered a multi-million-dollar touch-screen computer system to replace [the existing manual system]. His answer? How do I fix it in the Persian Gulf under attack, or during a typhoon?