How to make a ISO file out of a folder containing Windows setup files

Solution 1:

To do that, at first you will need a ISO image creator tool. PowerISO can be a good choice as it's interface is easy and making bootable image using this software is straightforward.

Now follow the image to drag and drop files inside PowerISO and select DVD 4.7G.

You will see that it is showing Non-bootable Image as no boot configuration is added yet. Now to add boot configuration, go to Action -> Boot -> Add boot information....

Then, in the dialog box click on the file icon beside File and go to the directory where your Windows 8 files are kept. Then follow the next image to select All Files(*.*) as the file type.

After that you will find a file named etfsboot. Select it and hit OK. Then you will see in lower left corner of PowerIso, now it is showing as Bootable Image, which means that you have successfully configured it as a bootable image. Now save the image file in your desired location and you are done.

Solution 2:

Create ISO image is able by MagicISO or CDBurnerXP.

Bootable USB stick is able to create by MS USB DVD Download Tool

OR you can use these MS commands.