Then one day I heard that a command called "win" existed, so typed it in and suddenly - and I remember the absolute excitement of that moment as if it was today and I am getting giddy just writing it down - the black and white screen exploded into the colors that is the windows for workgroup startup screen. Suddenly the mouse that came with it made sense!
Pretty sure that is the single most important event that steered me onto the path I have taken.
Then later I had PentiumIII running windows2000 and from somewhere aquired an ISDN card, put it in, rebooted, installed drivers, shut down to go to sleep, remembered I wanted to read something, booted up, shut down again, went to sleep, booted again in the morning only to be greeted by a bluescreen, that I wasn't able to fix - I would have to re-install Windows.
But I remembered that I had bought magazine that had something called "NetBSD" on a CD, so I thought I'd give that a go, and since then I have used the odd binarblobdriver, but my operating systems have been thoroughly open source and I've grown up to be a programmer - probably seeded from trying to manually install all dependency of X11 before I learned that pkgsrc is a "package manager".
But that splash of color really impressed me, and I am continued to be impressed how a machine that basically only knows how to turn on or off tiny little lamps in a grid took over the entire world.