Your download target is OK. However you cannot exclude a download problem, which means that something got corrupt.
You can check if the download is correct by using the hash tag / check sum. You find the hash tag information from here:
http://downloadarchive.documentfoundation.org/libreoffice/old/ > select the exact version you have (184.108.40.206 or 220.127.116.11) > click your version > select "win" and click > click x86 > slect the file you downloaded (it should be the one on top) and click "Details" > there you find Hash tags > choose the one your hash tag you matching your checksum verifier.
If you don’t have a check sum verifier look in the internet and you will find some. Here is what I am using as an example.
If the check number is correct and the installation is not running, then please provide exact information on what you did. Steps and results.