BitLocker Version Mismatch Troubleshooting Checklist - Troubleshoot Windows Security Proxy Issue-Fix Windows Defender Update Error 0x80070490 on Windows 11

Updated 2026-06-13 21:22:27windows-fixes
BitLocker Version Mismatch Troubleshooting Checklist - Troubleshoot Windows Security Proxy Issue-Fix Windows Defender Update Error 0x80070490 on Windows 11
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.