There is a whacking great caveat with Windows 10: if you used the media creation tool to create your installation media, you cannot use DISM nor the Recovery Drive option, as none of the required files are included in that package. What you must do, and this is completely legit, is to go to the Windows 10 download page on Microsoft's site, which will look like the following since you're on a Windows PC
But then open Developer Tools (F12) and change the user agent string to something not Windows, such as Apple Safari, which will allow you to then download the full proper ISO.
It will require a clean installation of Windows 10, but if your computer is very borked and you did something dumb like disable System Restore, there's not much loss. This is also not a bad thing to do if you have a perfectly healthy computer and are moving to the newer creator's update. Most games these days are purchased through digital services so only a small repair will be needed through the Steam, UPlay, or GoG client, and if you're smart like me you use Ketarin to keep up to date installers of programs you use, so aside from personalizations you can get back to normal in a few hours, faster if you use a Microsoft account.
