If your model of laptop/notebook was sold with a dual core (Turion) CPU, it may be possible to upgrade the CPU. If your model was not sold with a dual core CPU, don't waste your time or money (o1die's advice is quite good). Good luck!
my laptop has the turion tl-50. s1 socket cpus are dirt cheap. thinkin about upgrading. what would be the best performing socket s1 cpu?