Fixing PowerShell Update Error 0x800f081f (DISM Source Files) - Fix WireGuard Handshake Failure Checklist-Microsoft Store 502 Bad Gateway: Step-by-Step Fix

Updated 2026-06-13 22:41:55macos-help
Fixing PowerShell Update Error 0x800f081f (DISM Source Files) - Fix WireGuard Handshake Failure Checklist-Microsoft Store 502 Bad Gateway: Step-by-Step Fix
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.