Deleting doesn't resolve the issue because every time you restart the computer (or even when monitor goes to sleep mode), the old values will be back in the registry, aka smaller resolution than your monitor...the solution is to just change everything aka modify to fit your resolution, and the problem is solved, it will not change even when you restart. It will change only when you update GPU drivers, which is not so often, and then you just modify again. I had the same problem as you, Chrome resizing, and IDM moving, even when I deleted values, so I figured out what I wrote in this post, and it is the only solution without having to use some other software for it.
