Since I installed Parallels 10 Num Lock is not retained between launches or even when switching between apps (Windows app or Mac OS apps). Double bad is that when I hit Num Lock (Clear on my Mac keyboard) it doesn't take on the first keystroke following the Num Lock press. I love the speed of the new release, but this problem wastes so much of my time due to errors when entering data or code that I am seriously tempted to switch back to 9.