Create a Raspberry Pi boot SD card
How to create a Raspberry Pi boot SD card.
Download Win32DiskImager and grab the latest Raspbian Wheezy Linux distro. Unzip both files to appropriate folders, grab a 2GB or larger SD card, plug it into your PC and fire up Win32DiskImager’s .EXE file.
Select the .IMG file from the unzipped Raspbian download, choose the drive letter for your SD card and click ‘Write’. Once it’s complete, you can plug the card into your Raspberry Pi, boot up and follow the prompts. (The initial boot will expand the distro to use all of your card’s storage space.)