How to remove a "hidden" partition that Windows will not touch
This basic process will work with just one drive in the system, but I am writing these directions targeted to those who want to remove partitions from a second drive. Usually when such a partition exists on the only drive in the system it has a purpose and should not be removed.
- Attach the drive with the unwanted partition to an existing system and make certain it is recognized in the Disk Manager.
- Go to the run window. In Vista and Windows 7 just click the start button, in Windows XP click Start / Run.
- Type diskpart and press Enter.
- Type list disk and press Enter.
- Select the disk containing the “inaccessible” partition by typing select disk x, where x is the number of the disk, and press Enter.
- Once the disk is selected, type list partition and press Enter.
- Select the “inaccessible” partition by typing select partition x, where x is the number of the partition, and press Enter.
- Type delete partition override and press Enter.
That's it. Go back to Disk Manager and you will see that the partition no longer exists.