This Vintage Microsoft Windows 95 Upgrade in a Big Box is a rare find for collectors and tech enthusiasts. The factory sealed CD-ROM contains the operating system upgrade for Windows and MS-DOS, with a minimum of 4 MB of RAM and 35 MB of hard drive space required. The English language software is designed for a 386 processor and comes with one device license. This nostalgic piece of tech history offers a glimpse into the early days of personal computing and is a must-have for any vintage computer enthusiast.