I have an emachines pc running win xp home. It came with recovery disks to reinstall the OS if needed. I want to buy a new motherboard for this computer. I do not want to have to buy win xp for this PC. If I do this: Before you make the hardware swap you're going to want to change the IDE drive controller's driver. Go to your device manager, right click on the My Computer icon and go to properties. From there click the Hardware tab then click on the Device Manager button, that will open up a new window. Expand the IDE ATA/ATAPI controllers section, right click on the your main IDE drive controller and select Update Driver. Once the Hardware Update Wizard opens, select Install from a list or specific location (Advanced), then select the "Don't search. I will choose the right driver to install." radio box and click next. From there select Standard Dual Channel PCI IDE Controller and click next. Once that's done, Windows XP will be configured to use the default IDE controller driver so that you can swap out your motherboard without having the scary blue inaccessible boot device screen show. Of course, once you're finished swapping out parts simply install the latest drivers for the new motherboard and you should be set. http://220.127.116.11/KipSolutions/MovingXPNewMotherboard/MovingXP.htm Will I be able to reboot to windows and then reset the IDE controlller to the new MB's drivers without having to lose what is on my HD? I recently (three days ago) did clean reinstall of Windows. So there isn't much on it anyways. My fear is that my recovery disks won't allow me to reinstall windows because my hardware has changed. But I will be forced to reinstall because of the new MB. Is my product key good if I use an XP disk borrowed from someone else?