Windows Startup Repair Loop: How to Fix It

A Startup Repair loop happens when Windows repeatedly shows Diagnosing your PC or Attempting repairs, restarts, and lands back at the same repair screen without reaching the desktop.

This guide applies to Windows 10 and Windows 11 PCs stuck in the Automatic Repair or Startup Repair cycle.

Does This Affect You?

The loop does not automatically mean your files are gone. It usually means Startup Repair cannot fix the boot configuration, disk errors, damaged system files, or a recent update by itself.

Break the Loop and Open Recovery Tools

1. Let Startup Repair try once and fail if it has not already.
2. When the PC restarts and Windows begins loading, hold the power button for about 10 seconds to shut it off.
3. Repeat this two or three times at the same early startup point.
4. Windows should open the Windows Recovery Environment with a Choose an option screen.
5. Choose Troubleshoot > Advanced options. Do not choose Startup Repair again if it has already been looping.

Run Manual Repairs from Command Prompt

1. From Advanced options, open Command Prompt.
2. Run bootrec /fixmbr.
3. Run bootrec /fixboot.
4. Run bootrec /scanos.
5. Run bootrec /rebuildbcd and answer Y if Windows finds an installation to add.
6. Run chkdsk C: /f /r and let it finish.
7. Run sfc /scannow if available from the recovery environment.
8. Type exit, close Command Prompt, and choose Continue.

If Manual Repair Does Not Work

Try System Restore

From Advanced options, use System Restore to roll Windows system files and settings back before the driver, app, or update that started the loop, if a restore point exists.

Boot Safe Mode

Use Startup Settings > Restart, then press 4 or F4 for Safe Mode. If Safe Mode works, remove recently installed drivers, apps, or startup tools.

Uninstall Updates

Use Uninstall Updates from Advanced options to remove the newest quality or feature update if the loop began after Windows Update.

Reset This PC

If nothing else works, use Troubleshoot > Reset this PC. Choose the option that keeps personal files if available, and keep a backup whenever possible.

Sources

• Microsoft Support: Fix a Windows startup or boot problem
• Microsoft Learn: Windows Recovery Environment
• Microsoft Support: Use Startup Repair in Windows

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