AUTHENTIC NEW RARE Microsoft Windows NT 4.0 Service Packs 6The Microsoft Windows NT 4.0 Service Packs 6 is a standard operating system software bundle by Microsoft. It is designed for Microsoft Windows NT, Microsoft Windows NT Server, and Windows operating systems. The CD format software requires a minimum of 16 MB of RAM, 125 MB of hard drive space, and a 33MHz processor speed. With English language support, this unit is ideal for a single device and was manufactured in the United States. This service pack includes updates and improvements to enhance the overall functionality of the Windows NT Workstation 4.0 operating system.