If someone still cares, I have had same problem with my Phaser 6000 on Win 10 x64. I completely removed the Windows 10 drivers for Xerox 6000 along with the software that was downloaded from Xerox support. Then I've found my original installation CD. I hve installed the software from "Install" directory (not by setup.exe from root, as it said that I had wrong OS). Everything works for me now. It is absolutely necessary because otherwise I don't know the printer error that just occured ("Need to clean CTD sensor" in my case).