Step 1: Create a directory in C: called ESD. Ex: C:\ESD

To do this you open cmd as an admin and type cd/ then press enter the type mkdir ESD

Step 2:  Mount the ISO of the Operating

Step 3: Copy the install.esd located in G:\Sources

Drive letter will differ depending on devices currently attached.

Step 4: Paste the install.esd in the ESD folder

Copy and paste the install.esd file in the folder you created in step 1

Step 5: Open command prompt as an administrator

Run your command prompt as an Administrator.