I think Great Offer Stock actually ran out of the 6510b that I ordered the first time, and sent a better HP laptop the 6430b. I had to replace the machine when the one they sent 1st had a bad cord, but they sent a whole new laptop which I sent back with the bad cord from the 1st one. I knew all along that all it needed was a new cord, though. The 6430b is a great machine. That's why I didn't want the other one, and I also had gotten as far as putting a password in it when it just died as the battery went fully dead, but it started right back up with the new cord, and is working well and I am totally satisfied with it. It is fast and very efficient. It has 4GB RAM and 2.5 GHz processor instead of the 2GB RAM and 2.0GHz the 6510b has. So I am very happy with our purchase even though the 1st cord was bad and I had to wait another week for them to send a new one.