Previously when using Windows 7, even when I hold down Ctrl key, when I press Down Arrow, the "blinking text cursor" will still go down to the next line below. But on my new laptop running Windows 8 (and now Windows 10) when the Ctrl key is held down, the Down Arrow won't respond.

(I do editing for a certain wiki and to do formatting of some stuffs, it's simple to just Ctrl+V, Down Arrow, Left Arrow, and repeat. But sometimes I hold down Ctrl too long and the text cursor is prevented from going down, causing some wasted time backtracking to fix it.)

Does anyone have any idea of how to fix this, or what's causing this? Thanks.