Dual core. Day to day tasks you are unlikely to notice, quad core is good for some games and some highly intensive calculations. Vast majority of people wouldn't need quad core.
By M Attrill on 02 April 2014
If you bought it recently it will be "covered" by either the warranty from the manufacturer and/or the retailer who sold it to you. Of course you might need to think about insurance in the event it gets stolen or run over by a bus - therefore the current replacement cost is likely to be the relevant matter.
By Captain Sensible on 13 January 2015