Overwriting ubuntu

[ilaT]

While trying to overwrite my disk containing ubuntu with a bootable disk of windows XP i COME ACROSS AN ERROR STATING" HARD DISK HAS BEEN PLAGUED WITH A VIRUS DUE TO AN INSTALLATION" AND HENCE INSATLLATION OF WINDOWS IS NOT COMPLETED:(.Please help me remove ubuntu from my disk.
Regards

[Sef]

Before installing XP have the disk format the hard drive to NTFS.