msiexec /i "ShadowDefender.msi" /qn /norestart To suppress reboot and add logging:

ShadowDefender.exe /S /L=1033 If you have extracted the MSI from the installer:

It looks like you're looking into a of AR Shadow Defender 1.5.0.726 (likely a typo for Shadow Defender by Shadow Defender, or possibly an older/"AR" variant).

Here’s what you should know: For most versions of Shadow Defender (setup executable), these switches typically work:

ShadowDefender.exe /S Or with a specific language: