How to test what key on a keyboard is being pressed
When troubleshooting keyboard problems, you may need to determine if, when keys on the keyboard are being pressed, the computer is recognizing those keys. Below are some web pages and programs that can be used to help test the keys on a computer keyboard.
Windows on-screen keyboard
The Windows on-screen keyboard is a program included in Windows that allows you to not only use an on-screen keyboard, but can also be used to test the modifier and other special keys. For example, when pressing the Alt, Ctrl, or Shift key, the On-Screen Keyboard will highlight the keys as pressed. Unfortunately, this program will not highlight any of the letter keys as they are pressed.
The Passkmark KeyboardTest is a Windows program that can be downloaded to test the keys pressed on the keyboard with different keyboard layouts.