————————————————————————————————————————————————-

—

Windows 11 includes a native tool that tracks active disk locks.

1. Press Ctrl + Shift + Esc to open Task Manager.
2. Select the Performance tab on the left, then click the three dots (…) at the top right and select Resource Monitor.
3. Go to the CPU tab.
4. Expand the Associated Handles section.
5. In the Search Handles box, type your drive letter followed by a colon (e.g., E: or D:).
6. Look at the Image column to see the exact program holding the drive open. You can right-click the process to end it if necessary.

—

Microsoft maintains a free tool suite called PowerToys that integrates directly into Windows 11.

1. Download Microsoft PowerToys from the Microsoft Store or GitHub.
2. Ensure the File Locksmith utility is turned on in PowerToys settings.
3. Open File Explorer and go to This PC.
4. Right-click the external drive that will not eject.
5. Select What's using this file? (or look under Show more options).
6. A window will list all active processes using that drive, complete with an option to close them instantly.

—

For more detailed information or lightweight alternatives:

• LockHunter: A dedicated tool for unlocking files and drives. Right-click any drive in File Explorer, select What is locking this file/folder?, and it will display the process, path, and option to close or unlock it.
• Process Explorer (from Microsoft Sysinternals): A standalone utility provided by Microsoft. Run it as administrator, press Ctrl + F, type your drive letter (e.g., E:), and press Enter to search all active system handles.

From: https://chentiangemalc.wordpress.com/2011/05/08/windows-7-default-scheduled-taskscomplete-overview/

This is based on  a domain joined Windows 7 Enterprise x64 SP1 installation. The settings presented here 
should be default, or close to it. I haven’t consciously changed anything from a default install.