The safest next steps are the standard Windows Hello recovery path plus a hardware check, because the current symptoms point to either a biometric stack problem or a broader Surface hardware/driver issue.
- Sign in with the PIN, then remove and re-enroll Windows Hello Face:
- Go to Settings > Accounts > Sign-in options.
- Remove the current Windows Hello Face enrollment if it appears.
- Set it up again.
- Check whether Enhanced Sign-in Security components are running:
- Open System Information > System Summary and confirm Virtualization Based Security shows Running.
- Then go to System Information > Software Environment > Running Tasks and check for
bioiso.exeandngciso.exe. - If these are missing, the biometric secure components did not start correctly.
- Reinstall the biometric device driver:
- Open Device Manager.
- Under Biometric devices, uninstall the biometric sensor/device.
- Restart the Surface so Windows reinstalls the driver.
- Then test Windows Hello Face again.
- Restart the biometric service stack:
- First remove the PIN in Sign-in options.
- Open an elevated Command Prompt and run:
net stop wbiosrvc && net start wbiosrvc - Then add the PIN again and test facial recognition.
- This changes sign-in configuration, so make sure the account password is available before removing the PIN.
- If facial recognition still does not work, use the fallback sign-in method:
- Continue using PIN or password.
- If the PIN also stops working, reset it from Settings > Accounts > Sign-in options > PIN (Windows Hello) > I forgot my PIN.
- Because the attached Surface keyboard and touchpad also are not working, treat this as potentially device-level rather than only Windows Hello:
- For a Surface with a detachable keyboard, detach the keyboard and reattach it, then test again.
- If both the Type Cover input path and Windows Hello remain affected after driver reinstall and biometric service restart, device-level diagnosis is warranted.
About the likely cause:
- The context supports driver, biometric enrollment, or secure component startup problems as causes when Windows Hello Face is unavailable.
- The context does not confirm that build 26300.9550 specifically has a known compatibility issue with Surface Pro 9 facial recognition, so that cannot be concluded here.
- Since the biometric software device appears healthy but the service cannot initialize the face sensor adapter, and there is also a keyboard/touchpad issue, a broader hardware or platform integration problem is plausible.
If Windows Hello worked before, a recently installed app, driver, or update can also be involved. A restore or reset is listed as a later recovery option, but it is more disruptive and should be considered only after the steps above.
- [Windows 11](https://support.microsoft.com/surface/setup/troubleshoot-problems-with-windows-hello-on-surface)
- Windows Hello Enhanced Sign-in Security
- [Windows 10](https://support.microsoft.com/surface/setup/troubleshoot-problems-with-windows-hello-on-surface#before-you-begin)
- [Windows 10](https://support.microsoft.com/surface/setup/troubleshoot-problems-with-windows-hello-on-surface#windows-hello-doesn't-recognize-me,-or-i-get-an-error-message-when-i-try-to-sign-in)
- [Windows 11](https://support.microsoft.com/surface/setup/troubleshoot-problems-with-windows-hello-on-surface#tips-for-fingerprint-recognition-windows-hello)