Create a Windows 10 installation USB on another computer, boot the broken PC from it, and select Repair your computer instead of Install now; this opens a separate recovery environment that can bypass the account-password barrier encountered in the built-in recovery tools.^1^
1. Create and boot the repair USB
You need another working Windows PC and a blank USB drive of at least 8 GB. Creating the USB erases everything currently on that USB drive.
- On the working PC, open Microsoft’s Windows 10 download page through the installation-media instructions.
- Under Create Windows 10 Installation Media, select Download Now.
- Run
MediaCreationTool.exeand choose to create installation media on the USB drive.^2^ - Connect the USB to the broken PC.
- Turn it on and open its boot menu—commonly with F12, F9, Esc, or another manufacturer-specific key.
- Select the USB drive.
- At Windows Setup, select the language, select Next, and then choose Repair your computer—not Install now.^3^
If the USB does not appear, check the PC manufacturer’s instructions for changing the boot order.
2. Undo the update first
Because the failure started after an update, try this before broader repairs:
- Select Troubleshoot.
- Select Advanced options.
- Select Uninstall Updates.
- Select Uninstall latest quality update.
- Restart and test Windows.
If the menu also offers removal of the latest feature update and removing the quality update does not help, return and try that option. Windows Recovery Environment includes update removal specifically for recently installed Windows updates.^3^
3. Try the remaining non-destructive repairs
Try these individually, restarting after each one:
- Troubleshoot → Advanced options → Startup Repair → Restart.
Startup Repair checks common boot problems, including damaged system files, boot configuration, drivers, and registry errors.^4^ - Troubleshoot → Advanced options → System Restore.
Choose a restore point dated before the failed update. System Restore rolls back system files, settings, and installed programs without affecting personal files.^5^
If the drive is encrypted, these tools may request the BitLocker recovery key. That is a 48-digit recovery key, not the Windows password or PIN.^3^
4. Last file-preserving option
If those repairs fail, use:
Troubleshoot → Reset this PC → Keep my files
Choose Cloud download if networking works; otherwise choose Local reinstall. Keep my files preserves personal documents, photos, and other user data, but removes installed applications and resets settings.^6^
Do not select Remove everything or perform a clean installation. If the files are irreplaceable and no backup exists, stop before resetting and have the drive backed up by a reputable repair service. Although Keep my files is designed to retain personal files, no repair operation substitutes for a backup.
About the rejected password
Windows Recovery Environment asks for the account password, not the Windows Hello PIN. A PIN is device-specific and is different from the Microsoft account password.^7^ Since the built-in recovery screen has already rejected the passwords tried, use the installation USB route rather than repeatedly retrying that same screen.
References
- How do i get out of boot looping in safe mode without a password nor recovery disc ect. - Microsoft Q&A
- Create installation media for Windows
- Windows recovery environment | Microsoft Support
- Startup Repair
- System Restore
- [Windows 10](https://support.microsoft.com/windows/experience/backup-recovery/reset-your-pc#reset-options)
- Change or reset your PIN in Windows | Microsoft Support