How to fix blue Ctrl key on onscreen keyboard in Dell latitude 3460

Press and release the left and right Ctrl keys individually, then turn off Sticky Keys; this normally clears the modifier state represented by both Ctrl keys being highlighted on the On-Screen Keyboard.

Clear the Ctrl state

1. Press and release the left Ctrl key several times.
2. Press and release the right Ctrl key several times.
3. On the On-Screen Keyboard, click each blue Ctrl key once.
4. Press and release both Shift, Alt, and Windows keys as well. Releasing every modifier key can clear a stuck software state.^1^
5. Close and reopen the On-Screen Keyboard with Windows key + Ctrl + O.^2^

Turn off keyboard accessibility features

In Windows 10, open:

Start → Settings → Ease of Access → Keyboard

Turn off:

• Use Sticky Keys
• Allow the shortcut key to start Sticky Keys
• Use Filter Keys
• Use Toggle Keys

Sticky Keys allows modifier keys such as Ctrl to remain active for multi-key commands, so an accidental activation can produce this behavior.^3^

Restart the computer afterward and check whether the Ctrl keys remain blue.

If Ctrl becomes blue again

This suggests Windows is receiving a continuous Ctrl input from a keyboard rather than merely retaining an On-Screen Keyboard selection.

1. Disconnect any USB or Bluetooth keyboard.
2. Check that neither physical Ctrl key on the Dell keyboard is jammed. Gently press each around its edges and remove visible debris; do not pry off the keycap.
3. Restart and test the On-Screen Keyboard again.
4. If the problem remains, open Device Manager → Keyboards, double-click the keyboard, select Driver → Update Driver, and follow the prompts. Also check Settings → Update & Security → Windows Update → Check for updates.^4^

If both Ctrl keys still appear active after Sticky Keys is disabled and keyboard drivers are updated, the built-in keyboard or its controller may be generating a stuck Ctrl signal. Have the Dell Latitude keyboard tested by Dell support or a repair technician; keyboard replacement may be required.

References

1. i cant use certain keyboard for typing, but instead i can only do command such as alt+tab - Microsoft Q&A
2. [Windows 10](https://support.microsoft.com/accessibility/windows/windows-keyboard-shortcuts-for-accessibility)
3. [Windows 10](https://support.microsoft.com/accessibility/windows/make-your-mouse-keyboard-and-other-input-devices-easier-to-use#make-the-keyboard-easier-to-use)
4. Mouse and keyboard problems in Windows | Microsoft Support