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Fix Windows Activation Service Unavailable Without Product Key - Windows Activation Timeout: Clear DNS Cache Step-by-Step-Re-register Store Apps After Restore

Updated 2026-06-14 11:23:02office-tools
Fix Windows Activation Service Unavailable Without Product Key - Windows Activation Timeout: Clear DNS Cache Step-by-Step-Re-register Store Apps After Restore
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.

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