If you have a Surface Pen, and you installed the latest upgrade to Windows 10 – the Fall Creators Update, version 1709 – you may be experiencing problems with your pen.
No, the battery doesn’t need replacing.
No, your pen isn’t wearing out.
Instead, it looks like there’s a bug in 1709 that makes “pinch to zoom” fail – or simply disables the pen as a whole.
Poster GabrielleRice describes the worst problem on the Microsoft Answers Forum writes:
I have a Surface Pro 4, for which I've had a Surface Pen. My pen, however, has been malfunctioning. In essence, it stops writing. I can still use the buttons and my screen responds to touch, my keyboard still works, etc., but my pen simply will not write. Most puzzling, this problem comes and goes seemingly at random. The pen will be completely nonfunctional for hours at a time and then, without warning, will write flawlessly again. I've tried every troubleshooting tip to no avail, and have even replaced the battery. Replacing the battery helped briefly, but the problem has persisted. I went back again and tried the troubleshooting tips, but they haven't stuck. As someone who bought this tablet to help me with my digital art, it's really unhelpful to have a malfunctioning pen.