Did you order the parts and are assembling it yourself? Or is it prebuilt? If you ordered the parts and are assembling it, I would try to include someone who knows what they're doing into the assembly process. If it's prebuilt, you've got little to worry about. Just fire it up and it should all be set (assuming whoever you bought it from has the slightest clue as to how to build a machine). Give us an idea of what you're getting and we can help you better. List the parts, or link to the PC you bought.