My work machine has been happily upgrading through the various Insider Preview builds for some time now. Finally I’ve met one that’s irritated. Step forward, Build 10547. First thing I noticed was no mouse movement. Removing the and reconnecting the USB mouse made no difference. Luckily I’m keyboard savvy and can restart Windows without hitting the power button. I tried a PS/2 in the green mini-DIN socket but, although the red sensor lit up underneath, no movement on screen. So I plugged the USB ......