+ 0 Votes Are you using an Upgrade cd? 1bn0 5 years ago Thats the only time I've seen that message when installing Windows. I have not tried to install an XP Upgrade but with previous versions of Windows, if you try to install from scratch using an upgrade CD the installation will insists on seeing a full install cd (or floppy) from a full install version of Windows. MSOffice used to do the same thing. Do you have a Win98 or Windows2000 installation disk for a Full Install? If so try inserting that disk when it ask for the disk check. There may be work arounds to this, but I don't know any for XP and don't recall any for previous version of Windows.