Well... depends what OS you want to install on it, honestly.
Windows or Linux, firstly? Does it already have a product key sticker on it for a version of Windows? If not, do you already have a spare key, or will you need to buy one? If you're a college student in an engineering department, you can usually get a copy of Windows for free from DreamSpark.
Windows or Linux, firstly? Does it already have a product key sticker on it for a version of Windows? If not, do you already have a spare key, or will you need to buy one? If you're a college student in an engineering department, you can usually get a copy of Windows for free from DreamSpark.