[Elven]

Скачивать не захотел почему-то, немного поменял - заработало.

Код:

if (Get-ItemProperty -Path 'HKLM:\SOFTWARE\Microsoft\NET Framework Setup\NDP\v4\Full' | %{$_ -match 'Release'})
{
    $NetBuildVersion = 379893
    $CurrentRelease = (Get-ItemProperty -Path 'HKLM:\SOFTWARE\Microsoft\NET Framework Setup\NDP\v4\Full').Release
    if ($CurrentRelease -lt $NetBuildVersion)
    {
        $SourceURI = "https://download.microsoft.com/download/B/4/1/B4119C11-0423-477B-80EE-7A474314B347/NDP452-KB2901954-Web.exe"
        $FileName = $SourceURI.Split("/")[-1]
        $BinPath = Join-Path $env:TEMP -ChildPath $FileName
 
        if (!(Test-Path $BinPath))
        {
			Invoke-WebRequest $SourceURI -outfile $BinPath
        }
		
	$process = Start-Process -FilePath $BinPath -ArgumentList "/q /norestart" -Wait -PassThru 
	if ($process.ExitCode -eq 0){
		"$FileName has been successfully installed"
	}
	else {
		throw "Error exit code: $($process.ExitCode) file $FileName"
	}
    }
}