Anadar

You are going to need those API keys from Facebook etc, no matter what plugin you choose to use. So I think that you should keep the plugin and go through the process of getting the keys. If you don''t like the plugin and you are looking for a better paid one https://wordpress.org/plugins/oa-social-login/, I have used this one and really feature rich.

Glad I could help

I found this link, https://briangardner.com/add-widget-area-site-header/ maybe it will help. But I have a question, how it this section created, if it's a slider you could add the text without an extra sidebar

Yeah MSN45, that's a good point, if you have unused plugins or themes, you can just delete them from Wp-Admin.

I would recommend you a good plugin for improving WP Security, something that would prevent malicious code from being uploaded to the server, but I don't know any free ones, that impresesssed me. If you work with Wordpress a lot I recommend that you get a WPMU Dev subscription, they have a lot of great plugins. For security https://premium.wpmudev.org/project/wp-defender/ .

Hi I clicked the link but it redirects me to the 404 page. Here is a list of the stock wordpress file https://core.trac.wordpress.org/browser/trunk/src. The files from wp-includes, I am pretty sure you can just delete them. Your site content and theme are stored in wp-content. If you don't have experience with WP developement, I recommend that you install this plugin and run a full scan https://ro.wordpress.org/plugins/wordfence/. If you still want to upload the code to this forum just upload the files to your Google Drive, make them public and put the link in this thread,