Fix BitLocker Mount Error 0x80070005 on Mac - Fix Windows 10 Error 0xc004c003: Invalid Product Key-Windows Activation Proxy Server Not Responding – Solutions

Updated 2026-06-18 08:36:12developer-tools
Fix BitLocker Mount Error 0x80070005 on Mac - Fix Windows 10 Error 0xc004c003: Invalid Product Key-Windows Activation Proxy Server Not Responding – 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.