When Disk Management can’t remove certain partitions (often recovery, OEM, or protected partitions), the next step is to use a more powerful command-line tool with administrative rights— DiskPart —from an elevated prompt . Mike Meyers’ Lab Manual states: “The diskpart utility is a fully featured partitioning tool” and notes it “lacks many of the safety features built into Disk Management,” but it can “delete any partition of any type at any time.” It also describes using DiskPart’s clean command to “wipe all partition and volume information off the currently selected disk,” which is exactly what you’d do when you need to repurpose a drive and GUI tools won’t cooperate.

The All-in-One Exam Guide reinforces the same capability: DiskPart can delete partitions regardless of type and is available through the command prompt utilities for low-level disk work. Returning the drive to the manufacturer is unnecessary, malware removal isn’t the issue, and clearing a BIOS password on the old PC has no bearing on partition removal. The correct next step is using the CLI elevated.