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Home / office-tools / 7-Zip 'Cannot Open File as Archive' Error: Malware or Not? - Unstick Windows Update at 100% Complete-ERR_TUNNEL_CONNECTION_FAILED Troubleshooting Steps

7-Zip 'Cannot Open File as Archive' Error: Malware or Not? - Unstick Windows Update at 100% Complete-ERR_TUNNEL_CONNECTION_FAILED Troubleshooting Steps

Updated 2026-06-13 13:24:56office-tools
7-Zip 'Cannot Open File as Archive' Error: Malware or Not? - Unstick Windows Update at 100% Complete-ERR_TUNNEL_CONNECTION_FAILED Troubleshooting Steps
Prepare
Execute
Validate
Document

Operational follow-up

  • Record the exact option, command, or setting that changed the result.
  • Keep a rollback note if the workflow affects shared files or team settings.

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