Okay, I was born in '88 so I'd have been first using a computer at four... maybe? We had this awesome game that used the three ducklings that are Donald Duck's nephews... and they would swing through the jungle and jump from platform to platform - it was a very rudimentary "Donkey Kong" kind of set-up. That, and a Sonic the Hedgehog game, which had a spot on world three where you couldn't go past, there was nothing to jump to, no secret passageways or anything. I always was so frustrated when I got there, I had to restart the game.
It had a DOS system, I think the games were on floppy discs? If it were in front of me today I'd have no idea what to do with it, my family graduated to a Windows 64 computer that was a cast-off from a family we were friends with whose dad was an orthodontist - so they were very rich.
My first personal computer was a Dell laptop, that I bought the summer before my freshman year at college. It was an Inspiron... numbers I don't remember. It broke down a few years later, just stopped working entirely which was frustrating because I lost everything.