I have three XP Pcs all linked via home network (Hard wired). All service pack 3. My PC had the printer attached and all could print through my PC when it was turned on. Now, since a MS update my PC does not see the USB printer. Printer self tests and prints ok. I attached printer to other two PCs and now they cannot see it. Reload Dell drivers on all PCs, but no joy. Chnaged USB cables no joy. Attached all in one HP printer, cannot see that either.