You buy a car and you regularly change the oil and take it in for its mileage-appropriate checkups. Why? Because you don’t want it to die on you on the highway on the way to closing your biggest deal. Well, the same is true for your IT infrastructure – – your servers, desktops, firewalls, switches, wireless access points, etc. – – they all need regular maintenance or they will, per Mr. Murphy and his law, break down at the most inopportune moments.