Did Dow back up and reset and now?

How do I recover all the data that I made with Dell back up and Reset? I tried downloading zip files to unzip like windrower or seven zip and only some of the files are openable. Some are coming up 0 MB please help thank you. my Dell Support software doesn’t give me the option to restore the files so that’s why I had to download the zip openers. It’s a Dell XPS