I use a spacemouse (I'm sure a lot of us do) and some of the computers here have lost functionality of the spacemouse in Adobe Reader DC. Its been a pain here since all of our prints are in PDF and the spacemouse makes it really easy to pan and zoom in Adobe. My computer is one of the computers unaffected and we found out why. The newest driver update for the spacemouse doesn't include support for Adobe and I never updated the driver for my spacemouse since it has been working fine. The other computers are newer, have the newest driver installed, and dont have functionality in Adobe.