Try several of the different versions of Linux until you find one you like....
Start here...http://distrowatch.com/
My favorite for people that want to switch from Windows to Linux is Zorin OS (http://distrowatch.com/table.php?distribution=zorin), its easy to use and has the look & feel of Windows. Another one is Linux Mint (http://distrowatch.com/table.php?distribution=mint), rock solid. Both have lots of user help forums to get you going.
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