Microsoft Office 2000 academic can be started 50 times and then disappears from your desktop if you don't register it and you get this message the first time you startup after a fresh install. I have installed and registered mine at least 15 times for my daughter as she changed machines, had system crashes, and put it on my machine for a backup installation, and more reinstalls from component upgrades and the like, all with no static from MS. I can't imagine someone working for MS that is so bored that they are going to come after me for multiple registrations. They can't get blood from a turnip.