How to install windows 8 on a pc from usb?

I need to get windows 8 onto the usb first. I read online about an ISO file, but I have purchased a downloadable windows 8 from online and it gives me a .exe for the setup.

What is a VPN?

VPN is (Virtual Private Network) were first used by companies to enable their employees to securely access internal systems such as email remotely (e.g. from home or while on business trips). Today they are increasingly being used for personal use by individuals to protect their privacy while online in public places (e.g. when using the wi-fi connection in a cafe) or in a country where the internet is censored / blocked (e.g. China, Saudi Arabia��).