#711 MS Defender SmartScreen Blocking 7-Zip v26.05 Installer - Unknown Publisher

[lmacri]

If I try to run the 7z2605-x64.exe installer for 64-bit Windows downloaded from https://www.7-zip.org/ my Defender SmartScreen blocks the execution because the file has an "Unknown Publisher" (see attachment).

VirusTotal indicates the 7z2605-x64.exe file is safe (detection rate 1/70, report at https://www.virustotal.com/gui/file/fd99e86f57d8f429ef5ed045bf98315af962e2309b0f1ba87a147a44c71647d0). I know I have the option to ignore the SmartScreen warning and proceed with the installation but for now I'm choosing to cancel the installation.

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Dell Inspiron 15 5584 * 64-bit Win 10 Pro v22H2 build 19045.7807 * Firefox v158.0.1 * Microsoft Defender v4.18.26090.9-1.1.26090.9 * Malwarebytes Premium v5.7.3.376-167.0.5780 * Macrium Reflect Free v8.0.7783 * 7-Zip 64-bit v26.04

[lmacri]

The latest 7z2606-x64.exe installer (rel. 06-Nov-2026) downloaded from https://www.7-zip.org/ generates the same "Unknown Publisher" Defender SmartScreen block when I try to run the executable (see attachment).

The VirusTotal report at https://www.virustotal.com/gui/file/9b697f65ecc2d9b0152f5ee96d72dde522a7827690349d9307935dacf40f42ec indicates the uploaded 7z2606-x64.exe file is safe with a detection rate of 1/71.

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Dell Inspiron 15 5584 * 64-bit Win 10 Pro v22H2 build 19045.7807 * Firefox v159.0.1 * Microsoft Defender v4.18.26100.4-1.1.26100.4 * Malwarebytes Premium v5.7.3.376-167.0.5780 * Macrium Reflect Free v8.0.7783 * 7-Zip 64-bit v26.05