So I asked the computer store to help me build it (Including updating BIOS, BUT not OS). So when I get home with it, I'm going to install windows 7, then what should I do next? How will I get internet connection? Do I have to update specific things?
Windows should guide you through most of the setups. After that:
DO NOT INSERT ANY DRIVER CD THAT CAME WITH COMPONENTS! Instead, boot up your browser and go DIRECTLY to the the website of EACH of your SPECIFIC components and download the drivers from there! THEN install. You should be okay after that. Windows should take care of internet installation.