Transmac Drive Has Been Locked By Another Program Jun 2026

Press the , type cmd , and press Ctrl + Shift + Enter to open an elevated Command Prompt. Type diskpart and press Enter. Type list disk and press Enter to see all connected drives.

Windows Explorer often automatically attempts to index or generate thumbnails for files on newly connected drives. If the drive contains a file system recognizable to Windows (such as FAT32 or exFAT partitions often found on bootable drives), Explorer keeps an open handle on the drive letter. This prevents TransMac from locking the physical drive.

Warning: Choosing the wrong disk number can erase your main hard drive. Double-check the size!

error. This usually happens because Windows is aggressively protecting the drive or a background process is keeping it busy. Here is how to break the lock and get your drive ready. Why is My Drive Locked? Antivirus Software : Tools like Windows Defender MalwareBytes Transmac Drive Has Been Locked By Another Program

If the drive partition table is corrupted or locked, Windows diskpart can erase it, releasing the lock. Open Command Prompt as . Type diskpart and press Enter. Type list disk and press Enter.

Plug the drive into a different USB port (preferably a direct port on the back of the motherboard if using a desktop PC, rather than a USB hub).

Move the flash drive from a front case port to a rear motherboard port (for desktops) or try a USB 2.0 port instead of USB 3.0. Press the , type cmd , and press

Type select disk X (replace X with your actual drive number).

Antivirus and antimalware software automatically scan external drives the moment they are plugged into a USB port. This real-time scanning locks the drive. Open your antivirus software settings.

This process deletes all data on the selected USB drive. Ensure you select the correct drive number. Windows Explorer often automatically attempts to index or

Ensure programs like Rufus, Etcher, or partition managers are closed. 3. Clean the Drive Using Diskpart

His stomach turned cold. He looked back at the error message, but now there was a new line below it, typed in a monospaced font that didn't match any program he owned:

If the partition table on the USB is corrupted or partially formatted in a format Windows doesn't recognize, the system might repeatedly try to read it, causing a permanent lock. Cleaning the drive via the command line breaks this loop.

: If you have programs like Daemon Tools or PowerISO running, or if the DMG file itself is mounted as a virtual drive, Windows may lock the physical USB. Right-click any virtual drives in "This PC" and select Step 2: Use Diskpart to Force Clear the Drive

Here is a comprehensive guide to identifying the culprit and unlocking your drive. Quick Fixes