Compag Presario Window 10.Works,but battery last around 30min.Comes with charger.Just few screws are missing. (When charged when losing power it laptop will say wrong like 1hour 20 min power left,but it real it will be less left.If battery run out while it turn on,it will turn off and after will be very slow to start laptop again).I don,t know CPU speed or cores.I put them at random.I think RAM is 2GB(as 2 memory sticks inside, one 1GB,other does not say how big).It said 409GB left from 447GB,so I think hard drive is 447 GB.Sold as is.As per picture,2 keys are missing,but they still work.Postage at buyers risk,if I post ,no refund(I will pack in the box,bubble wrap).