Please follow the instructions below on how to install Windows 7/8.1/ and Windows 10* ISO Without Using DVD/USB Drive .
Step 1: Download and install Virtual Clone Drive or PowerIso.
Step 2: Firstly, go to the directory where you have saved Windows 7 ISO file. Right-click on the ISO file, select Open with and then select “Mount files with Virtual Clone Drive” to mount your ISO file.
Step 3: Go back to My Computer (or Just Computer) and then double-click on the Virtual Clone Drive icon to start Windows 7 installation process.
Yes, you are installing Windows 7 without a DVD or USB drive!
Step 4: Next, follow the normal Windows 7 installation procedure to finish the installation. Windows may restart during the install process. Worry not, everything will go fine.
*Only applies If you intend to upgrade to Windows 10 from within the Windows 7 or 8 desktop environment
Virtual Clone Drive: http://download.cnet.com/Virtual-CloneDrive/3000-20432_4-173879.html
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