OK,so i have an old toshiba sattelite laptop,which i bought in 2007.It has an intel cetrino cpu.Now,the laptop works really slow.So,i thought of replacing it with an intel pentium dual-core cpu or an amd dual core cpu,if that is even possible.If so,can you guys give me a link where i can buy these.Also,tell me if you can upgrade ram on these laptops.If so,then please refer an online link where i can get 4gb ram for less money.