The Essentials Service Pac offering provides three-year 24x 7x 4-hour response hardware warranty upgrade, including three-year remote technical software support for clients running Microsoft Windows & Linux (Red Hat & SUSE) operating systems. IBM systems director support is also included. The Virtualized Essentials Service Pac offering provides three-year 24x 7x 4-hour response hardware warranty upgrade, including three-year remote technical software support for clients running in a virtualized environment. VMware, Microsoft Windows, Microsoft applications, Red Hat Enterprise Linux, SUSE Enterprise Linux & IBM systems director are all supported.