I have a rather old laptop which is set up to dual boot between Windows XP and Linux (Red Hat 9) using GRUB. Unfortunately this machine now needs to be fully dedicated to Windows (it only has a 10GB disk, and we have 8GB of data to be cleansed using a Windows app), so I've had to remove Linux. This proved slightly trickier than I suspected, mainly because of my own rashness.
The laptop was configured with four partitions:
1. the main Windows partition (XP was installed before Red Hat)
2. a Linux boot partition
3. a Linux OS partition