Software vendors usually give their customers ample time to shift to a new operating system (OS) before sunsetting support for the old one. If you are fortunate, providers extend their deadlines to accommodate heavy customer demand, or ask people to pay extra (and often exorbitant) fees to continue receiving patches for the old OS.

But why let your business rely on something as fickle as luck? In the end, the money you’ll pay in fees would have been better spent on a new OS, anyway.