I have two computers, one running Windows XP, the other Windows 7. The Windows 7 machine will boot into the Paragon Backup & Recovery environment from either a USB flash drive or a DVD, but the Windows XP machine does not recognize either media as bootable. I have made 3 different bootable DVDs. All of them work under Windows 7, but none will boot on the XP machine. I have tried every possible combination of BIOS boot parameters. Other bootable DVDs, such as one prepared from the Linux-based System Recovery CD 3.3.0 .iso file (sourceforge.net) boot on the XP machine with no difficulty. Does anyone have any idea what the solution to this problem could be?