Those were the years that I put UNIX on my everyday Desktop and then afterwards Linux on my everyday Desktop.
Looking back on the 40 years of my having a Desktop, Microsoft owned the operating system used on my Desktop for a mere six years, between 1985 and 1991. (MSDOS)
I have never run Windows as my everyday Desktop. I had been using the UNIX GUI Desktop for several years when MSFT introduced Windows 3.1 to the world. I looked at it, but couldn't believe just how horribly primitive it was, even for Microsoft.