zhizhu
Home / windows-fixes / How to Transfer Windows 10 Digital License to a New PC - How to Resolve BitLocker 504 Error When Unlocking a Drive-Windows Defender Not Updating: Version Mismatch Fix

How to Transfer Windows 10 Digital License to a New PC - How to Resolve BitLocker 504 Error When Unlocking a Drive-Windows Defender Not Updating: Version Mismatch Fix

Updated 2026-06-13 22:03:02windows-fixes
How to Transfer Windows 10 Digital License to a New PC - How to Resolve BitLocker 504 Error When Unlocking a Drive-Windows Defender Not Updating: Version Mismatch Fix
Likely symptom
Likely cause
Safe rollback

Verification route

  • Repeat the original action, not only a simplified test case.
  • Restart the app or reload the service after configuration changes.