If you want to format and clean install Windows operating system in your computer system, you need an offline ISO file (disc image file) of Windows to create an installation media such as bootable USB drive or a DVD.
Once you create installation media, you can boot using it and then you can format existing partitions and perform a fresh installation of Windows in your machine. You can also upgrade your existing Windows version to a new version using the installation media.
Installation media may also come handy if you are facing problems in your computer system and want to repair Windows installed in your device.
Many times users get the Windows setup disc with the purchased computer system but sometimes many branded computers do not come with any setup or repair disc.
In such situations, downloading offline ISO file of Windows is the only option available to users.
Did you know Microsoft officially provides full standalone offline ISO files (disc image files) of Windows 7, Windows 8.1 and Windows 10 for free download to the public?
Yes, you read it right. You can download genuine/original offline ISO files of all 3 Windows versions from following download page at Microsoft official website:
After that we shared another method to download Windows 7 and Windows 8.1 offline ISO files which can be found at the following links:
BONUS TIP:
After downloading the offline ISO file, you can burn the ISO file to a DVD using any burning software and then install Windows using it.
You can also create a bootable USB drive to install Windows in your computer without optical drive using the following tutorial:
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