Believe it or not, up to November 1st many could and still were buying licenses for Windows 3.x (mainly for embedded systems like cash registers and airline entertainment systems from companies like Virgin). But on that day, Microsoft discontinued their licensing of the product. After 18 years, the iconic Windows platform is no more.
Requirements for the OS included a 8086/8088 processor with clock speed of 10MHz, 7MB of storage (better move Police Quest to a floppy) and 640KB of RAM. And when you realize that