Fix Error 0x80070643 in Windows Update on Mac via Boot Camp - How to Break Out of a Command Prompt Login Loop in Windows 10-WinRAR Checksum Error: Causes and Solutions

Updated 2026-06-16 00:09:46backup-recovery
Fix Error 0x80070643 in Windows Update on Mac via Boot Camp - How to Break Out of a Command Prompt Login Loop in Windows 10-WinRAR Checksum Error: Causes and Solutions
Before changing system settings, save your work and note the exact error text so you can compare results after each step.

Extra verification checklist

  • Restart the affected app after changing permissions or configuration files.
  • Test the same workflow in a clean browser profile or a temporary user account.
  • Compare the result on another network if the error may be connection related.