Solution:
Root Cause: Windows Biometric Framework Database Corruption
Windows stores enrolled biometric template hashes in an encrypted local database located under
C:\Windows\System32\WinBioDatabase. When feature updates alter security encryption keys or crash during logoff initialization,
.DAT database files can become corrupted. The Windows Biometric Service (
WbioSvc) fails to read or overwrite corrupted database slots, causing crashes in the Settings app.
# Diagnostic Verification:
Inspect Event Viewer under Applications and Services Logs > Microsoft > Windows > Biometrics > Operational.Look for Event ID 1001 or 1002 indicating database read/write failures.# Step-by-Step Fix:
1. Stop the Windows Biometric Service (
WbioSvc):
Open Admin PowerShell and run: powershell
Stop-Service -Name WbioSvc -Force
2. Backup and Clear WinBioDatabase Directory:
Execute the following commands in PowerShell: powershell
$DbPath = "$env:SystemRoot\System32\WinBioDatabase"
Copy-Item -Path "$DbPath\*.DAT" -Destination "$env:TEMP\WinBioBackup" -Force
Remove-Item -Path "$DbPath\*.DAT" -Force
3. Restart Biometric Service to Re-create Clean Database Files:
Run: powershell
Start-Service -Name WbioSvc
4. Re-enroll Fingerprint Biometrics:
Open Settings > Accounts > Sign-in options > Windows Hello Fingerprint.Click Set up and follow prompts to record fresh fingerprint templates.# Prevention & Long-Term Monitoring:
Always remove and re-enroll fingerprint biometrics prior to initiating major Windows build upgrades.