Hi Pete,
Not sure how you installed Windows XP Home Edition on the partition, but
I would advise you to back up the information you wish to save off of the
Hard Drive. Depending on how large the Hard Drive inside you Laptop is, I
would partition the Hard Drive into two partitions. Drive C: where you would
install Windows XP Home Edition and Drive D: would be used for your Data
files, like My Documents folder, otherwise, move the files you want saved
off the Laptop Computer.
Next, I would use the Windows XP Home Edition CD, booting from it and I
would Format and Reinstall Windows XP Home Edition. By formatting and
reinstalling will fix your problem. Make sure thou, that you can boot from
the CD-Rom Drive first.