We just got in 9 new Dell Precision 690's with 4 GB of ram, Intel Core Duo 6400 Processors and Quadro Fx 3450 video cards. They should be awesome. However, when we open a drawing in Civil 3D and then try to load the xrefs it just freezes, no errors, no crash it just freezes. The file and xrefs will open on our older computers, but not the new ones. I am thinking I missed something on the install, but I don't know what. Please help. This is a lot of money sitting in my office.