coondoggie writes "With Microsoft aiming to release Vista real soon now, they've been retiring older versions of the Windows OS. For IT outfits it's yet again time to evaluate what stays and what goes, and make plans for the future. Network World discusses the life cycle of Microsoft's software." From the article: "'Generally, it is a bad idea to run unsupported software, but there can be a business case to run it,' says Cary Shufelt, Windows infrastructure architect at Oregon State University, in Corvallis. The university still has some NT machines running in isolation in its labs. But Shufelt says there are security risks in allowing connections to legacy machines and that the university makes sure to minimize those risks. 'We don't allow [Windows] 9.x clients to connect to our Active Directory,' he says. 'But we try to stay current with technology so these issues don't typically come up.' Others say they also stay current to avoid headaches and fire drills."