My Toshiba laptop which I had for 5 years died recently, and it was a Win7 computer which I upgraded to Win10 several months before it died. I also had downloaded the Windows 10 .iso file, saved it to the hard drive and then burned it to a DVD in case I needed it. It's an .iso file that's about 3.8GB in size if I remember correctly.
Now, I have a new Dell laptop which I bought less than a week ago. Of course, it has Win10 on it already, along with other things. The amount of used space on the hard drive is 39GB. I'm looking to do a one-time backup of my computer to have in case of a hard drive failure someday in the future. I just want to back up the basics. I'm having some problems doing it, but then I remembered that Win10 .iso file I have on a DVD. Would that be sufficient to restore my new laptop if it's hard drive failed and had to be replaced? Or is there more to it than that? I imagine there are drivers and other stuff I'd have to get. But with the Win10 .iso alone, would my computer function enough that I could go online with it and download the needed drivers?