Fix Windows 11 startup and sign-in problems.

Troubleshoot boot loops, black screens, Automatic Repair failures, PIN or password errors, missing sign-in options, Windows Hello problems, user-profile failures and slow logins. Start with the symptom you see and use the least disruptive fix first.

Windows 11 startup and login problems covered here

Choose the guide that best matches where the failure happens: before Windows loads, during startup, on the sign-in screen, or after login.

Boot loops and restarts

Repeated restarts, update loops, spinning-circle freezes, failed boot attempts and recovery loops.

Black screen problems

Black screens before login, after login, with a cursor, or after a driver, update, sleep or display failure.

Automatic Repair failures

Automatic Repair loops, Startup Repair failures, recovery errors and PCs that keep opening advanced startup options.

PIN and password errors

Incorrect PIN messages, unavailable PINs, forgotten sign-in details, password rejection and account verification problems.

Windows Hello problems

Fingerprint, face recognition, camera, biometric service and Windows Hello setup or sign-in failures.

Missing sign-in options

PIN, password, fingerprint, face recognition or account choices missing from the Windows 11 login screen.

User profile errors

Temporary profiles, profile service failures, blank desktops, corrupted accounts and problems loading user settings.

Slow login and loading

Long welcome screens, delayed desktops, frozen sign-in pages, startup app delays and unusually slow account loading.

Why Windows 11 startup and login problems happen

Startup and sign-in failures can be caused by interrupted updates, damaged boot files, incompatible drivers, storage errors, corrupted system files, account problems, broken Windows Hello components, startup software, malware, or failing hardware. The correct fix depends on whether the issue appears before the Windows logo, during loading, on the sign-in screen, or after login.

Guides added to this hub will begin with the least disruptive checks before moving to Safe Mode, Startup Repair, System Restore, command-line repairs, account recovery, boot configuration changes, or Windows reset options.

How to use these startup and login guides

Pick the guide that matches the exact symptom and note when it started. Begin with reversible checks such as a restart, recent update or driver review, and account verification before moving to Safe Mode, recovery tools, boot repair or reset options.