Here we are looking back to the most "hated" operating system of the past that was released in early 2007. The reason why it gotten to be the most hated operating system ever was due to people having old computers that had Windows XP on it and the hardware they had was not working due to the new driver signature enforcement that Vista had made because of "security". That's not the only reason the second one is due to the annoying UAC (User Account Control), it caused people to get mad over that annoying dialog. Ever since Windows Vista got bad reputation, OEMs and software makers started to decrease support to the most hated operating system. Vista's legacy still lives on in the latest current operating system called Windows 10.