While I agree with Greg, above, I find myself asking 'How soon out of the box is this ?'.
While you give no indication as to where you live - this is one of the reasons why this information is useful - you say this is a 'refurbished computer' as opposed to 'brand new'. Even so, you have some rights as a purchaser. If this is within the 30 or 90 days warranty that is fairly normal with refurbished equipment, I would take / send it back. Why should you faff with problems that are not of your making and your supplier's responsibility ?
A normal problem with an international web-site like BC is that consumer law varies widely from one country and region to another. Since I live in Scotland, I am reasonably knowledgeable on UK and EU consumer law but have only a vague idea of the details of similar legislation in, for example, the USA, and none at all of the law as it applies in, say, Japan. This is why it is useful to know at least the country you live in !