try mo sa disk management at pati yung kung nasaan ka nagfoformat at nagiinstall ng windows.
at kung naka windows 8 and up ka. try mo sa "safe mode using Command Prompt."
Try mo i run cmd as admin
Type, diskpart
Then type, list disk
Then type, select disk (number of your target drive)
Then type, clean.
Press enter every step.
Try mo i run cmd as admin
Type, diskpart
Then type, list disk
Then type, select disk (number of your target drive)
Then type, clean.
Press enter every step.