Sounds to me as if you did a parallel installation (put the XP install and kept the 98) rather than the upgrade (XP overwriting the 98). You can stop the option screen by editing a file called boot.ini Remove the second line which has something like: multi(0)disk(0)rdisk(0)partition(1)\WINDOWS="Microsoft Windows 98" /fastdetect As for getting your hard drive space back, it depends. If XP was installed in the c:\windows directory (where the original 98 install resides) then you are out of luck. If XP installed in another folder (C:\windows.000 for example) then you could delete the original Windows 98 folder (ie C:\windows). Windows 98 is a pretty small installation (350 MB or so) so you would not gain that much space by deleting it. Try running disk cleanup on the C: drive.