When it comes to upgrading an operating system, home users have plenty of flexibility. Whether running Windows, Mac, or a Linux-based OS, moving to the latest and greatest should be a fairly uneventful affair. For businesses, however, bleeding edge is hardly ideal. After all, companies use their computers to make money — there is no room for downtime due to upgrade issues. In other words, if it isn’t broken, don’t fix it. This is why many in the corporate world still run Windows 7.