Can I delete duplicate system files?

I have taken it upon myself to really organize my files after 15 years of music, video and picture collections. Over the years, I've backed up and had many hard drives and even did backups of stuff I forgot I even did. I now have put everything into...

I have had issues with windows taking folder and file permissions from me for random and non-windows items like ShareX. I've tried looking online for answers but none of them have really given me the ability to regain ownership and make alterations...

I think I downloaded a .reg file from internet that created double system folders in my computer but I can't remember. They seem to be an extra music, videos, documents, pictures and downloads folder but I cannot put any files in the folder. Anyone...

A Google search shows a few programs and none of them I'd trust on general principle, you know, the flashy type websites which you know the program is probably full of ad ware or something nasty? Any reliable program that can take two folders and...

I have a folder with many duplicate image files. I want to keep one of each duplicate (triplicate and more). How do I find the extra files and delete them? Thanks.......