Some laptops may require you to hold down a Function key (commonly labeled “Fn”) while pushing Num Lock to toggle it on or off. The keyboard is a logitech MK260 set. I have tried pressing the FN+num lock and FN+Shift+num lock and the problem still persists. If you’d like to receive an audible alert when you push the Num Lock key, follow this guide to make your computer play a sound when you type the Num Lock key, so you’ll know if you pressed it by accident. Your laptop will vary.
For this purpose, you should try plug in another keyboard onto your PC.
HP One Touch Multimedia and Internet keyboards. Most laptops don’t have dedicated numeric keypads, so Num Lock works differently on them.
(If yes to that last one - replace the defective keyboard… Contact Alice Woods Select configure my anti-Keylogging protection and Disable it. This is not a common problem, but when it happens, either some or all keys stop working (depending on the situation), or features of the keyboard such as b CNET staff Sept. 2, 2009 3:14 a.m. PT Her mission on Ugetfix - to share the knowledge and help users to protect their computers from malicious programs.