1. The keyboard input abnormality is caused by Num Lock turning on or input method conflicts, driver problems, and game compatibility; 2. Check the Num Lock status first and switch to tests; 3. Switch the input method to English mode and adjust the system language settings; 4. Update the keyboard driver or uninstall third-party interference software; 5. Run the game as an administrator or adjust the compatibility settings. The above steps are checked in sequence to solve the problem of keyboard input abnormalities in most cases.

If you find that the numbers entered by the keyboard become letters when you are playing games, or the numbers pop up when pressing the letter key, this is usually because your keyboard accidentally enables the "Num Lock" function or is a problem with some system settings and the game itself. Solving this problem is actually not complicated. The following methods can help you troubleshoot and fix it.

Check Num Lock status

Many mechanical keyboards and laptops come with a Num Lock key, especially in some layouts with numeric keypads. Once this function is turned on, it may cause you to output numbers when you press certain letter keys.

• Solution:
  • Find the Num Lock key on the keyboard (usually in the upper left corner or numeric area) and press to switch state.
  • Some notebooks need to be used with the Fn key, such as Fn Num Lock .
  • You can observe whether the indicator light on the keyboard is on and determine the current status.

If you are not sure which key triggers this function, you can open Notepad or Word on the desktop and press a few letters to test whether it is normal.

Input method conflict in the game

Some Chinese input methods (such as Sogou and QQ pinyin) remain active after entering a full-screen game, which may cause the key mapping to be incorrect. For example, a number appears when WASD or arrow key is pressed.

• Recommended operations:
  • Before entering the game, manually switch the input method to English mode.
  • Check if there is an option to "disable input method" in the game settings.
  • The default input language can be adjusted in Windows settings and English is the preferred one.

This situation is particularly common in games on the Steam platform, such as "CS:GO" and "Genshin Impact" that support Chinese input.

Check keyboard driver and system settings

Sometimes the problem is not in the game, but in the system-level keyboard settings or driver exceptions.

• You can try:
  • To update or reinstall the keyboard driver: Open Device Manager → Keyboard → Right-click to select Update Driver.
  • Check whether there is any interference from third-party software, such as keyboard macro tools, shortcut key managers, etc.
  • Try to connect an additional keyboard test to troubleshoot hardware failures.

If you are using an external mechanical keyboard, plugging and unplugging the USB interface may also be effective.

Compatibility issues with the game itself

Some old games have poor support for modern operating systems and may experience keyboard mapping errors. Especially the old XP era games running on Windows 10/11.

• Processing methods include:
  • Right-click the game icon → Properties → Compatibility → Check "Run as Administrator".
  • Change the game resolution or run mode to window mode.
  • Check out if the game community has similar feedback, and the official forum may have patches or setup suggestions.

Basically, these common causes and corresponding solutions are all about them. In most cases, starting with the two points of Num Lock and input method can basically solve the problem. If it still doesn't work, consider the operation at the system or driver level.

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