internal/Set-7zExe.ps1

function Set-7zExe
{
    if(Test-Path "C:\Program Files\7-Zip\7z.exe")
    {
        $7zip = "C:\Program Files\7-Zip\7z.exe"
        Return $7zip
    }
    if(Test-Path "C:\Program Files (x86)\7-Zip\7z.exe")
    {
        $7zip = "C:\Program Files (x86)\7-Zip\7z.exe"
        Return $7zip
    }
    else
    {
        Write-PSFMessage -Level Critical -Message "7zip not installed to default location" -ErrorRecord $_
        Exit 1
    }
}