HotkeyScan
Find what program is holding a hotkey on Windows, with the evidence.
...The verdict keeps each layer on its own line and says which one spoke; when the owner cannot be seen, it says unknown and does not guess.
Scan them all sweeps 761 combinations and can keep only the ones held by an owner Windows will not name. A separate Key monitor shows one key three ways (raw input, window messages, hook chain), to tell a faulty key from a program swallowing it.
One 64-bit .exe with the .NET runtime inside: nothing to install, no administrator rights. MIT licence, no ads, no telemetry.