The dual core will run some applications faster, but also run warmer. These cpus rarely come with a heatsink. If the system freezes up after installing one of those cpus, I would change to a better heatsink. You'll have to do some research to find one that fits your motherboard. Can't help you there. You'll also void any warranty. I personally wouldn't do it. With black friday just days away, you should find a good dual core laptop for $600 or less. Unless you can do the upgrade for $100 or less, better to sell your old laptop in tact and start over.