Code 52 means Windows cannot verify the digital signature of the keyboard driver, so it blocks the device. In this state, the built‑in keyboard will not work, and normal driver updates or rollbacks may fail.
Because this affects basic input, the most reliable way to recover is to repair or reset Windows so it reinstalls a clean, properly signed keyboard driver from Microsoft.
Use a hardware keyboard temporarily if possible (USB keyboard)
- Connect a USB keyboard to the ThinkPad so there is a working keyboard during repair.
- Sign in to Windows using that keyboard.
Run the built‑in Windows troubleshooters
- Open Settings → System → Troubleshoot → Other troubleshooters.
- Run:
- Windows Updates
- Keyboard
- Follow any fixes they suggest and restart.
If the issue persists, reset Windows while keeping files This reinstalls Windows system files and drivers (including the Microsoft keyboard driver) while preserving personal files. Apps and settings will be removed.
- Open Settings → System → Recovery.
- Under “Recovery options,” select Reset this PC.
- Choose Keep my files.
- Select Cloud download (recommended) or Local reinstall.
- Confirm and let the process complete. The PC will restart several times.
- After reset, sign in and verify the keyboard works.
If even with a USB keyboard the system is unusable or reset cannot be started, take the PC to a qualified repair technician so they can:
- Boot into recovery environment.
- Repair or reinstall Windows 10 Pro 22H2.
- Confirm the keyboard driver is properly signed and working.
If accessibility assistance is needed (for example, difficulty using temporary hardware or on‑screen keyboards), contact the Microsoft Disability Answer Desk for direct support. They can provide step‑by‑step help and options tailored to accessibility needs.
References:
- Mouse and keyboard problems in Windows
- Windows 10 notification: “Your device has reached the end of service”
- Microsoft PC accessories help & learning
- Basic tasks using a screen reader with the Feedback Hub
- Use a screen reader to add a signature in Outlook
- Plethora of issues relating to windows and possibly security. - Microsoft Q&A
- Keyboard keys malfunctioning - Microsoft Q&A
- How to reset my keyboard? Combination of "Alt + L " gives weird characters and message is sent automatically. - Microsoft Q&A