I am a begginer free lance technician and the town I am in requires operating systems of all generations and I can't begin to tell you how many times I have had a customer that has an obsolete Os such as Xp,2000,ME (ETC) and I was wondering in there is a place that I could get these Os (free) such as an ftp client or such.

Thank you for your time

Well I wouldn't post that here, but google will give you a lot of fair answers. (I know, I don't wanna be that guy.) And even if it is infected, who cares, you won't be using it for long...