For those folks that purchased Windows XP upgrade CDs or have OEM CDs—yes, you can install a clean copy of Windows XP using them. Follow the instructions that I've outlined in this column. The setup program will ask you to provide the qualifying product's CD. After it verifies that you have the CD of the product you're upgrading, the process continues normally. If you're stuck with the OEM's recovery CD or don't have a CD that qualifies, you must install the recovery CD first, and then upgrade to Windows XP.