Hello,i would like to upgrade my cpu in my laptop, right now I'm running a Intel core 2 duo p7450 and would like to ramp it up with a t9900 the only difference i can see in the specs that might cause a problem is that the thermal design power is different (35w t9900 and 25w p7450)not knowing what I am doing though it to be wise to ask.. Will the t9900 be a drop in replacement for the p7450???
You cannot in almost any case upgrade the CPU in a laptop, firstly, it is most often socket incompatibilities, thermal design and the fact that the CPU is often placed in a way that removal is destructive to the system.
Laptops can only have their RAM and HD upgraded in the best case.
I hate to say it, but you are completely wrong. Very few laptops have CPU's that are hard soldered to the motherboard. I have upgraded CPU's in many of my laptops, from Toshiba's to Dell's to HP's. The only incompatibility you run in to is BIOS incompatibilities. Please do your research before you give others advise.