[snarfy]

But they can't be bothered to tell which process is holding it, not even a damn PID. C'mon guys, bare minimum here, and this issue has been there for decades.

It's great you added file locksmith to powertoys but that should be a built in OS feature for many, many years now.

[dmaginas]

Maybe the Restart Manager API (RmStartSession/RmRegisterResources/RmGetList) can return the list of processes that hlod a file open. Is available since Vista. The Shell UI just doesn't call it.