Keyboard Commands not working as exected

The keyboard command for moving a note down (ALT DOWN) or an octave down (CTL ALT DOWN) is not working. The list of keyboard commands shows that it should be working but if I try to re-enter it, it is ignoring the ALT key. Anyone else run into this?

Windows 10 Pro
32 MB memory
AMD 8350 8 core 4 hz
64 bit

Welcome (back) to the forum, Brian. When these kinds of key commands aren’t working, it’s typically because another application or utility on your system is interfering with Dorico’s key commands. A common culprit could be your display drivers, which often assign modifiers plus arrow keys for things like changing the display orientation.