It sounds like you don’t want to install Apache, but you do want Apache Bench. May I recommend XAMPP? Download the zip or 7zip versions (much larger download than regular Apache but you won’t have to install). Unzip the download.
This is where what I would recommend, and where you currently are converge. Since you already have Apache installed you should already have Apache Bench.
You will find it under
.\apache\bin\ab.exe
in the zip file, if that is what you downloaded, it will be under
.\xampp\apache\bin\ab.exe