As I am going to submit my site: www.windowslatest.com to Google news. I need to hide few articles such as the how to ones to get approved. Is there any plugin that would allow me to hide specific posts from appearing on the website's homepages without slowing down the server?
You should create a static page and design for what u want there.
Yes I am Also Using This Plugin in My Website down2hub.com
Plugin - https://wordpress.org/plugins/wp-hide-post/
It Gives You Option To Hide Particular Post From Homepage or elsewhere
Use a plug in or create a static home page. These are the only two options which I know of.