I can't make IntelliJ 14.1.4 act on the ctrl+alt+arrow hotkeys on Windows 7. I already disabled the Intel hotkeys and don't know any further.
Confirmed, on my machine disabling hotkeys did nothing.
Sadly I had no administration privileges for disabling that service on my machine. Other solution that works, is to change the hotkey from the original one to something relevant.
Changing the hotkeys to something else will release the hotkeys so it looks as though the driver registers the hotkeys no matter what.
This program should show you is something else is handling the Ctrl-Alt-Arrow combination currently: https://www.donationcoder.com/forum/index.php?topic=18189.msg163170#top
Unfortunately, there doesn't seem to be a way of figuring our what program is handling it.
I found the solution here.
In Windows CTL + ALT + F12 opens Intel control panel. Go to options and disable hot keys.
This is how it looks, but I added more details. https://superuser.com/a/1198318/522926
If you need to enable hot keys back (note, CTL + ALT + F12 will not work), go to Start menu in Windows paste Intel Graphics and run one of these files: Gfxv4_0.exe, GfxUIEx.exe, Gfxv2_0.exe.