Windows 96
Pretty. :)<p>Gives me PTSD-like flashbacks to the time when I was tasked with installing Windows 95 on 50+ computers on the local school.<p>For the young(er), Windows was on 14-ish 3.5" floppy disks, and I had to do some heavy calculation and logistics copying those discs while installing the OS to make my effort as efficient as possible.<p>IIRC, I managed to keep the installing cyclus going on 28 computers at a time, and finished the whole task during a very long Saturday and Sunday.