Not much choice, in this corner, I'm afraid.
Win XP Sp3.
Had this PC since May 2005. I had it built as primarily a music machine but it has also had to put up with every other type of application imaginable. It is chock full of so much stuff that I often wonder how it still goes on.
I see no way in which I could upgrade, financially, so the thoughts of changing the OS do not even enter my head. I have no problems at all with the way it behaves ... apart from it being a bit slower than a 'modern' one would be .... but the old saying 'what you haven't had you don't miss' certainly applies.
James