AUTHENTIC NEW RARE Microsoft Windows NT 4.0 Service Pack 6 Debug / Checked BuildThe Microsoft Windows NT 4.0 Service Pack 6 Debug/Checked Build is a standard edition operating system with a minimum of 16 MB of RAM and 125 MB of hard drive space. It is designed for use with Microsoft Windows NT, NT Server, and Windows operating systems. This CD format unit is in English language and has a minimum processor speed of 33MHz. It is a single unit licensed for one device, originating from the United States. This specific build is equipped with enhanced debugging features for troubleshooting and testing purposes.