Hi & Welcome to Linux Questions-
If your new to Linux I recommend running Linux Mint 17.
Cinnamon is nice but so is Mate-
Download the .iso for your computers architecture. (32-bit or 64-bit) and burn it at a slow speed to a CD/DVD.
http://www.linuxmint.com/download.php
If the CD or DVD doesn't boot go into your BIOS and set the boot priority to CDROM.
Than save the changes and exit your BIOS. The Live Linux Mint CD/DVD should than boot and walk you through the isntallation.
If you want to install Linux along side of Windows 7 there is an option during the Mint installation that will enable you to do that.