Background

Laptop, recently upgraded with a bizarre symptom: once logged in, the numeric keypad stopped working. Freshly migrated to Windows 10, a Toshiba Satellite c(something)...

Research

When you quickly search for it on bing/google... you'll find some hints like

  • updating BIOS (check, latest installed)
  • checking BIOS (well, ...nah, it is working at logon)
  • registry settings (maybe, but ..nope, lets first try the normal stuff)
  • some other windows settings

Solution

This one was the primary hint to solve the issue. But actually the thread discusses the solution for Windows 7.

" if you have Windows 7, just go to Ease of Access Center >>>>>> Turn on Mouse Keys and make sure it's unchecked"

Steps for Windows 10

Well, how about Windows 10?

First go to Settings.

Find the Ease Of Access Within Ease of Access, check the Mouse option

In the Mouse settings, check the Mouse Keys settings.

Make sure the option to "use numeric keypad to move mouse around the screen" is disabled/off.

Conclusion

Easy, simple, but this single setting isn't easily found, as you won't think about mouse settings. Certainly, when searching apps, files and settings, and the setting does not show up when typing "numeric" or "keypad"