[Fixed] Sharepoint 2016 prerequisites fails - Download error

Users mostly facing issue while running Sharepoint 2016 prerequisites installer is - "Download error".

I also faced this issue while running the prerequisites setup, so that I manually download and install those components but this is not the solution. if you install prerequisites manually then there are 80% chances that your SharePoint is not configured properly using SharePoint product configuration wizard. I will point out those issues as well in my later post.

Let me come to the point, what error looks like:

now, HOW TO FIX THAT 

The problem is IE is set to not download files and also IE enhanced security is ON.

So before running the prerequisite installer, go into IE/Internet Options/Security/Custom Level and enable file downloads. However, this isn't enough.
Also, need to go into server manager and disable IE Enhanced security.
Set OFF in IE Enhanced Security Configuration option, in both places- Administrators as well as in Users, and click on OK.

That's it, you are done!

Now try to run the prerequisites setup again, this time it will smoothly download the components without fail.