I must say, it sounds as though your XP setup is too badly corrupt to be
fixed. The next step would be to do a clean install which includes
formatted during setup. This will wipe your drive so I hope you have backed
up your data as this will wipe your drive, deleting all data currently on
the drive. The procedure for this is as follows:
***NOTE: if you have partitioning software such as Partition Magic,
www.powerquest.com, you could try creating a new partition if you don't have
a free partition for this, install XP to that drive, pull your data from the
current drive then delete the current partition and use the new
installation.
Failing that, however, it would appear your only choice is a new install to
the current drive:
Boot with the XP CD in the drive. When you see the message on the boot
screen to "Press any key in order to boot from the CD," do so.
After loading drivers and files, you should be taken to a screen with
the following:
To Setup Windows XP now, press ENTER.
To Repair a Windows XP Installation using Recovery Console press R.
To Quit setup without installing Windows XP, press F3.
In your case, press ENTER.
Agree to the License agreement by pressing F8.
You will then be taken to a screen with two options.
To repair the selected Windows XP installation press R.
To continue installing a fresh copy of Windows XP without repairing,
press ESC.
This will bring you to a partition map where you
can delete, create and format partitions.
Select the drive you wish to format, delete the partition, then create a new
partition, format as desired and continue with XP installation.