If it aint broke, don't fix it is my motto.  My 2001 Win XP Pro box lasted more than a dozen years, it was actually the Mother Board that finally died.  I never had the blue screen of death - ever - not once.

I've replaced it with an acer Win XP Home Edition (second hand) - swapped out the Ram for the maximum (which would have cost a small fortune new) and added a graphics card.

Hasn't missed a beat in the last three years.