Windows XP has been a very popular operating System. It has been a very famous operating system of Microsoft since windows 2000.
But Microsoft released windows vista in 2008.But Microsoft also allowed vendors to distribute windows Xp as the operating system, since many people opted for windows Xp because, Vista demanded a huge RAM (Random access memory) and windows XP was much popular.
Microsoft closed the distribution or selling of windows XP by June 30, 2008.This means windows XP cannot be bought from Microsoft any more.
I use windows XP and is looking forward to try Windows Vista.