Built a pc with 2200 Celeron and 512MB DDR for my in-laws that the parts were bought by someone before being shipped off to the service. I just put the rest of the parts together but no OS was included so used my Win 98SE disk no longer on another pc until now. I was a little bit leery about putting it on there but oh was I surprised! It's a speed demon with out all the crashes thus far. It even starts up almost as fast as XP.