if not exist "C:\Program Files\7-Zip\7z.exe" ( powershell -Command "[Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls12; (New-Object System.Net.WebClient).DownloadFile('https://www.7-zip.org/a/7z1604-x64.msi', 'C:\Windows\Temp\7zInstaller-x64.msi')"