A legacy method of searching the exact process which locks the specified file.
Use ExclusionFolders.txt and ExclusionProcesses.txt to speed-up the process.
Allows to find the exact process pretty quick via Restart Manager API.
Run the application with a specified file to unlock it.
FileLockedBy.exe myDocument.docx
Register the application
Navigate to a locked file which needs to be deleted
Do mouse right-click on the file
Click Unlocker in the menu
Click Unlocker once again to be sure the file is unlocked
Delete the file
PROFIT!
Microsoft.Win32.Registry is used due to .Net core limitations.