Thank you so much, Judith, I'm doing it now. Even if it by some odd chance screws up the other one, I'll still be able to reload the program and just transfer the libraries. As if 16 gigs would ever be a big enough C disk for a graphics fanatic. It was partitioned by the seller not me. I just got ZBrush and no place to put it. It's going on Drive E. Have I mentioned lately that I love this forum???