Huh. Never thought of that. The receiver isn't exactly recessed, but it's worth a go. Batteries are all good, they were the first thing I changed.

Thanks for the reply. It isn't that the trackball doesn't work. It's that, no matter what I do, at odd intervals the thing just won't respond. It skips across the screen, almost as if it's stuck. ...

I've read about this issue on the internet, and have tried everything that I could find, yet STILL my wireless trackball simply doesn't work with Windows 10.

Specs:
Windows 10 anniversary...