Basic PowerShell Function to download and install MSI or executables on a system, this can also compare and upgrade based on file version.

install-app.ps1

function Install-App {
    <#
    .DESCRIPTION
        Basic PowerShell Function to download and install MSI or executables on a system, this can also compare and upgrade based on file version.
    .PARAMETER msiURL
        The url to the .msi file
    .PARAMETER exeURL
        The url to the .exe file
    .PARAMETER InstallCheck
        The executable to check if already installed
    .PARAMETER VersionCheck
        The miniumum version required, will update if older than this.
    .PARAMETER ArgumentList
        Arguments to pass to the installer
    .PARAMETER additionalFiles
        Additional files required within the directory.
    .EXAMPLE
        Install-App -msiURL "http://example.com/file.msi" `
            -InstallCheck "C:\Program Files\Application\Endpoint.exe" `
            -VersionMin "2.3"
#>
    [CmdletBinding()]
    [OutputType([PSCustomObject])]
    param (
        [Parameter(Position = 0, Mandatory = 0)]
        [string]$msiURL,
        [Parameter(Position = 1, Mandatory = 0)]
        [string]$exeURL,
        [Parameter(Position = 2, Mandatory = 1)]
        [string]$InstallCheck,
        [Parameter(Position = 3, Mandatory = 0)]
        [string]$VersionMin,
        [Parameter(Position = 4, Mandatory = 0)]
        [string]$ArgumentList,
        [Parameter(Position = 5, Mandatory = 0)]
        [array]$additionalFiles        
    )

    $folder = [Environment]::GetFolderPath([System.Environment+SpecialFolder]::CommonApplicationData)
    If ($msiURL) { $url = $msiURL }
    If ($exeURL) { $url = $exeURL }
    $fileName = ($url -split '^.*\/(.*)\.(.*)$')
    $fileName = $fileName[1] + '-' + (Get-Date -Format M-yy) + '.' + $fileName[2]

    If ($VersionMin) {
        if (Test-Path $installCheck) {
            if ($((Get-Command $installCheck).FileVersionInfo.FileVersion) -gt $versionMin) {
                Return "Installed product is higher than required, Skipped $fileName"
            }
        }
    }
    elseif ((Test-Path $installCheck)) {
        Return "Already Installed, Skipped $fileName"
    }
   
    [array]$FileSource = @($url)
    if ($additionalFiles) { $FileSource = $FileSource += $additionalFiles }

    if (-not (Test-Path "$($folder)\PSInstall\")) {
        New-Item -Path $($folder) -Name "PSInstall" -ItemType Directory | Out-Null
    }

    try {
        Import-Module BitsTransfer
        foreach ($File in $FileSource) {
            Start-BitsTransfer -Source $File -Destination "$($folder)\PSInstall\$($fileName)"
        }
    }
    catch {
        foreach ($File in $FileSource) { 
            Invoke-WebRequest -Uri $File -OutFile "$($folder)\PSInstall\$($fileName)" 
        }
    }
        
    foreach ($File in $FileSource) { 
        if (-not (Test-Path "$($folder)\PSInstall\$($fileName)")) { 
            throw "$($folder)\PSInstall\$($fileName) - does not exist"
        }
    }
            
    Write-Host "Started $fileName Install on $($env:computername)"
    If ($msiURL) {
        $Process = Start-Process -FilePath "$env:systemroot\system32\msiexec.exe" `
            -ArgumentList $("/i ""$($folder)\PSInstall\$($fileName)"" $($ArgumentList) /log ""$($folder)\PSInstall\$($fileName).log"" ") `
            -Wait `
            -PassThru
        
        If (@(0, 3010) -contains $Process.ExitCode) {
            Return "Completed $fileName Install on $($env:computername)" 
        } 
        else { 
            Return "Failed to Install $fileName with Error: $($Process.ErrorCode)"
        }
    }
    elseif ($exeURL) {
        $Process = Start-Process -FilePath "$($folder)\PSInstall\$($fileName)" `
            -ArgumentList $("$($ArgumentList)") `
            -Wait `
            -PassThru

        if (Test-Path $installCheck) {
            Return "Completed $fileName Install on $($env:computername)" 
        }
        else {
            Return "Failed to Install $fileName"
        }
    }
}