You're not the only one who finds the IE10/11 scrollbar hard to use: see
here and
here.
I managed to create black horizontal and vertical scrollbars. Somewhat easier to find than the dim gray default ones, but they're still ugly flat blocks that blend in with the rest of the screen elements.
No doubt there are many others who'd prefer to be able to see the scrollbar at a glance instead of having to hunt for it.
It would be great if Classic IE were to offer a real, 3D scrollbar. How about it, gentlemen?