The Lexmark (!) driver to fix the Samsung ML-4500 XP problem (as above). I forgot to add, once installed, still retain your Samsung driver as default. (The Lexmark driver will allow you to print but the options are for a lexmark inkjet so you can't use toner save etc).The Lexmark driver merely needs to be installed on the computer to stop the "found new hardware" message showing at every start-up, you don't actually have to print with it. It's a weird solution, I know, but it was supplied by Samsung themselves!