Sign-in process initialization failure. Interactive sign-in process initialization has failed

Windows not being able to start the logon UI (Winlogon/LogonUI). It can happen after updates, driver issues, corrupted system files, or profile corruption.

I have some recommend step that you can try and let me know the result

Step 1: Try Safe Mode

1. Restart the PC.
2. As soon as it starts booting, press F8 (or hold Shift + F8, sometimes requires multiple tries) OR interrupt boot 3 times to trigger Windows Recovery Environment (WinRE).
3. Go to Troubleshoot → Advanced options → Startup Settings → Restart.
4. Choose 4: Safe Mode or 5: Safe Mode with Networking.

-> If Safe Mode works → issue is likely with display drivers, startup programs, or updates.

Step 2: Run Startup Repair

1. Boot into WinRE (same method as above).
2. Go to Troubleshoot → Advanced Options → Startup Repair.
3. Let Windows attempt to repair boot and sign-in components.

Step 3: System File & Image Repair (from Recovery Command Prompt)

1. In WinRE, open Command Prompt.
2. Then run:

sfc /scannow /offbootdir=C:\ /offwindir=C:\Windows

(Adjust drive letters if Windows is not on C: in recovery.)

3. Then run:

DISM /Image:C:\ /Cleanup-Image /RestoreHealth

Step 4: Check Pending Updates / Rollback

• If the issue appeared after a Windows Update:
  • In WinRE → Troubleshoot → Advanced options, try Uninstall latest quality update or Uninstall latest feature update.

Step 5: User Profile Check

Sometimes Windows fails to load the interactive sign-in process due to a corrupted profile. In Safe Mode, create a new user:

net user NewAdmin P@ssword123 /add
net localgroup administrators NewAdmin /add

Then restart and test login with that account.

Step 6: As Last Resort

• Use System Restore (if enabled) to roll back to a working state.
• If none of the above works → you may need to perform an in-place repair upgrade (boot from Windows 10/11 ISO, choose Repair your computer).