Since the XP boot loader files are on the original C: drive, to avoid bootup problems after you switch drives you should boot with the original XP CD and watch carefully when it asks if you want to repair your installation and choose this option. If you can buy a copy (maybe the demo works?) of PowerQuest DriveMapper or similiar software to correct your drive letter changes in your registry, all your programs will function as normal. Depending on the speed of your system, give yourself at least 3 hours to get everything right and donīt forget to reinstall all software patches and updates to your XP installation. I do not think the product activation issue will come up but be prepared. Howard Rubin Fortaleza, Brazil RE: Date: Sun, 16 Mar 2003 14:42:06 -0500 From: Jim Dirksen <[log in to unmask]> Subject: Going back to one OS I didn't get any responses on my first post so I'm asking again. I now have XP & 98 on 2 drives. 98 is on C: Master Drive, XP on D: Slave Drive. If I uninstall 98, change jumpers & make D: Master with XP (the only OS), XP will then be on C: What problems will I have with everything that used to be D: is now going to be C: Right now everything is on D: & I don't want to mess that up. Any thoughts or the proper procedure on this would really help. Thanks.......Jim PCBUILD's List Owners: Bob Wright<[log in to unmask]> Drew Dunn<[log in to unmask]>