Recently I bought a Lexmark X5470 all-in-one printer, only problem is I cant connect it trough the USB. What happens is that, as soon as I connect the USB for the printer, XP search install and ask for drivers, so I install the drivers and suddenly it says that the printer havn't been installed correctly. And if the USB is in computer while rebooting, windows wont even start. The screen just go black .... untill i unplugg the USB. And when I do that XP starts as it should be. I've noticed one more thing too. My mouse suddenly stops working when my printer is connected, and when i unplugg the USB - once again ... mouse work. Now, I've installed the latest driver both for the mouse and also the printer, on lexmark website. I personally think that it's a conflict in XP, something to do with IRQ settings, but I'm not sure. I've formated the HDD. Used other USB slots - nothing. Tried to uninstall my printer drivers and reinstall them, and same with the mouse vice-vera. And there is also a yellow exclamation mark on 'USB Universall Serial Bus', which means the drivers arn't installed correctly. I'm thinking about buying a USB slots on PCIcard. But I don't want to spend something that could be fixed. So what do you think? What's wrong? Thanks.