I too had a hick with recent Windows 10 update.
A Word hotkey ceased to work and the program froze every time.
Turns out, it was a conflict with another app (which was fixed by the company within 24 hours).
But, before you find out why, you panic and think, "hey, do i have a virus etc.?!"
If something similar happens again, might be going back to dual booting with Windows 7 once and for all.
Have been dabbing around with LinuxMint KDE 18.2 beta as of late, and this version is just superb!