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Fix a keyboard that types wrong characters

We'll check the keyboard layout, Num Lock, and input language—or tell you when to call support.

Troubleshooting · Devices & software
5–15 min
What you'll need
  • PC or Mac with a keyboard (built-in or external)
Step 1 of 7

Quick triage — pick your path

Quick triage — pick your path

Choose the option that matches what you see. You can jump straight to that section.

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Steps

Goal: Check layout, Num Lock, and modifiers—then isolate the cause.

  • Run through layout, Num Lock, and modifier keys first.
  • Good: You find the cause and fix it. Proceed to Verification.
  • Bad: Proceed to Check layout.

Check layout and language

Goal: Confirm the correct keyboard layout and input language are selected.

  • Check the language indicator in the taskbar (Windows) or menu bar (Mac). Click it to see the current layout.
  • Open Settings, Time & language, Language & region (Windows) or System Preferences, Keyboard, Input Sources (Mac). Add or select the correct layout—QWERTY, AZERTY, QWERTZ.
  • Good: Correct layout selected. Proceed to Check Num Lock.
  • Bad: Wrong layout—change it and test.

Check Num Lock

Goal: Confirm Num Lock is off when typing letters.

  • Press Num Lock (or Fn+Num Lock on laptops) to toggle. When Num Lock is on, the number pad or some letter keys may produce numbers.
  • Good: Num Lock is off. Proceed to Modifier keys.
  • Bad: Num Lock was on—turn it off and test.

Check modifier keys

Goal: Confirm no modifier key is stuck.

  • Tap Shift, Alt, Ctrl, and Fn to release any stuck key. A stuck modifier changes what other keys produce.
  • Good: No modifier stuck. Proceed to Update driver.
  • Bad: A key was stuck—release it and test.

Update driver (Windows)

Goal: Update the keyboard driver when layout and Num Lock are correct but keys still type wrong.

  • Test in Notepad or TextEdit. If layout and Num Lock are correct and keys still type wrong, try updating the driver.
  • Device Manager, expand Keyboards. Right-click the keyboard, Update driver, Search automatically. Restart if prompted.
  • Good: The keyboard types correctly. You are done.
  • Bad: Keys still type wrong or keyboard has a yellow warning—see When to get help.

When to get help

Contact the device manufacturer or IT if:

  • The keyboard still types wrong characters after changing layout and Num Lock.
  • Keys are physically stuck or repeat.
  • The keyboard has a yellow warning in Device Manager.

Provide keyboard model and OS version.

Verification

  • Keys type the correct characters in Notepad or TextEdit.
  • The correct keyboard layout is selected in the taskbar or menu bar.
  • Num Lock is off when typing letters.
  • No yellow warning on the keyboard in Device Manager.

Escalation ladder

Work from the device outward. Stop when the problem is fixed.

  1. Layout and language Confirm the correct keyboard layout and input language are selected.
  2. Num Lock Turn off Num Lock if letter keys produce numbers.
  3. Modifier keys Check that Shift, Alt, Ctrl, or Fn are not stuck.
  4. Remove and re-add layout Remove wrong layout, add correct one, restart app.
  5. Call support Wrong characters persist or keys physically stuck.

What to capture if you need help

Before calling support or posting for help, have these ready. It speeds everything up.

  • Keyboard model and OS version
  • Which keys produce wrong characters
  • Steps already tried

Is the correct keyboard layout selected?

Taskbar or menu bar shows the layout—QWERTY, AZERTY, etc.

Check the language indicator in the taskbar (Windows) or menu bar (Mac). Confirm the layout matches your physical keyboard. Good: correct layout—proceed to Num Lock. Bad: wrong layout—change it in Settings, test.

Yes No

You can change your answer later.

Change layout and test

Settings, Language & region (Windows) or Keyboard, Input Sources (Mac). Select the correct layout. Test in Notepad or TextEdit.

Done

Is Num Lock off?

Num Lock on can make letter keys type numbers.

Press Num Lock (or Fn+Num Lock on laptops) to turn it off. Good: Num Lock off—proceed to modifier check. Bad: Num Lock was on—turn off, test.

Yes No

You can change your answer later.

Turn off Num Lock and test

Press Num Lock to turn it off. Test typing.

Done

Is a modifier key stuck?

Shift, Alt, Ctrl, or Fn can change key output.

Tap Shift, Alt, Ctrl, and Fn to release any stuck key. Good: no modifier stuck—proceed to driver. Bad: key was stuck—release it, test.

Yes No

You can change your answer later.

Release modifier and test

Tap each modifier key. Test typing.

Done

Update driver (Windows)

Device Manager, Keyboards, right-click keyboard, Update driver, Search automatically. Restart if prompted. If keyboard has yellow warning or still types wrong, call support.

Done

Reviewed by Blackbox Atlas

Frequently asked questions

Why would a keyboard type wrong characters?
Common causes: wrong keyboard layout (QWERTY vs AZERTY, etc.), Num Lock on, wrong input language, or sticky keys. Check layout and Num Lock first.
Can I fix a keyboard that types wrong characters myself?
Yes. Change the keyboard layout in Settings, turn off Num Lock, confirm the correct input language, and check for sticky keys. Most issues are settings-related.
When should I call support for a keyboard?
If the keyboard types wrong characters after changing layout and Num Lock, or keys are physically stuck. Provide keyboard model and OS version.

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