How has Windows changed over the past 30 years?

With the first ever version of Windows launching in 1985, Microsoft’s desktop operating system has seen no less than 12 iterations throughout the past 30 years.
The first ever OS, Windows 1 Series, was described as a ‘unique software that was specifically designed for the serious PC users’.
Its best feature can be considered the ‘point and click mouse’ function, which meant the user no longer had to type MS­DOS commands and could simply select specific options using the mouse.
Skip ahead to 2015 and Windows 10 features Cortana – a personal voice assistant that can conduct web searches, set reminders, add calendar events and much more.
But how did the operating systems evolve over the years, and how did each new version change the way PC owners used their devices?
Read the full rundown of Windows Through The Ages over on PCR's sister publication IT Channel Expert.