So do you want to use this to upgrade your current install?
Did you use the
Windows 10 media creation tool that you can download from Microsoft?
If you use that tool, it will make a Win 10 installer on USB or DVD
If you have the ISO you will need to burn it onto a DVD or USB first to access the files
to upgrade to win 10 without losing anything. look at the USB or DVD in File Explorer and run setup.exe
that should run you through the upgrade process