Use an external keyboard for access if available, then separate one damaged key from a Windows, accessibility or full-keyboard fault.
Step-by-step checks
1. Check the scope
Test the sign-in screen and a simple text editor. Note whether all keys, one row or only shortcuts fail.
2. Review accessibility settings
Check Filter Keys, Sticky Keys and the keyboard layout. An unexpected setting can look like hardware failure.
3. Restart and update
Restart normally and use Windows Update plus the laptop manufacturer for keyboard, chipset and firmware updates.
4. Test an external keyboard
A working USB keyboard restores access but does not alone prove the internal keyboard is defective.
5. Inspect for physical risk
Look for liquid, impact, lifted keys or case swelling without removing keycaps or opening the laptop.
When to stop
Shut down after liquid, burning smell, swelling, exposed components or a keyboard lifted by the battery. Internal keyboard replacement may require full disassembly.
What to tell an expert
Share the device model, operating system, exact symptom or error, when it began, what changed beforehand, and which checks you completed. Do not send passwords, one-time codes, encryption recovery keys, or unnecessary personal files.
Official reference
This Supportia guide was prepared with current official guidance as a factual baseline. Interface names can still vary by device and version. Open the official reference.
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