replace pc's
most large companies replace their computers every 3 to five years. this is customary. even some small business do it as well. if you have a company with more than 50 employees and you buy the machines for example, from dell, you can replace the computers for about $300 a person which is very cheap.
Macs get the same treatment on most businesses. i have customers that have print shops and they have macs for their desingn rooms. they get them replaced or upgraded every two years so they can keep up with the design appiications they run. a business even a small one that runs on a computer that is older than five years old, is a business that will not last long. he who has the latest survives this economy. any weakness on this economy and your comany goes down the tubes.