I was just wondering if I should even bother upgrade the CPU for my Sony Vaio PCG-K45. It's a Mobile Intel Pentium 4 Processor 538 3.2GHZ 533FSB 1 MB L2 Cache. Do laptops support the old pentium 4 Hyper threading technology cpu? I have a lot of computers at home some newer ones as well. I just wanna upgrade this CPU to a better one, if possible.