a4d474777f
On Windows the Hermes venv interpreter cannot CreateProcess a binary under C:\Program Files\WindowsApps (WinError 5) even though the shell resolves it, so `hermes computer-use doctor` died with a raw PermissionError traceback from _open_mcp. Catch the spawn OSError and print what failed, why the tool may still work (PATH resolves another copy), and the fix (reinstall outside WindowsApps or HERMES_CUA_DRIVER_CMD), exit 2.