1) Have you tried to use CTRL+ALT+DELETE to see if the password field displays?
2) You can try uninstalling the latest updates to see if this fixes your computer:
- Hold Shift and click Restart wait until computer navigates to the Options page
- From the Options select "Troubleshoot"
- Select "Advanced Options"
- Select "Uninstall Updates"
- Select "Uninstall latest feature updates"
If this is helpful please mark as correct answer.