Hard drive cannot partition

When you use "FDISK" to repartition your computer's hard disk, the original extended partition will not be erased.

Boot to the computer DOS system, run the "FDISK" command, found the hard drive capacity of 40GB, the extended partition accounted for 25GB. In turn, enter the Dekete partition Or longical dos Drive → delete Extend DOS Partition menu to remove the extended partition, but you are prompted not to delete the extended partition. In turn, enter the "delete partition Or longical dos Drive" → "Delete Logical dos Drive (s) in the Extended DOS Partition" menu, delete the logical disk, but prompted not to delete the logos Set of dishes.

Fdisk can not see whether the partition is hidden, through the Pqmagic tool software, into the pqmagic to see the hard drive, there is a partition is hidden, click "Cancel", hide back. When you enter Fdisk again, a logical disk is found, entering "delete partition Or longical dos Drive" → "Delete Logical dos Drive (s) in the Extended DOS Partition" , delete the logical disk. In the "delete Extend Dos Partition" menu, the extended partition is finally removed. Reformat the partition, install the system, and the computer can return to normal.