Can I Upgrade My Laptop?

Q: Can I upgrade my laptop such as RAM, processor and display adapter?

Upgrade cpu for the laptop could be done but required skilled assembly work, and I dont think you can upgrade for built-in onboard component. However, you can add more memory that would be good enough.

So it is next to impossible to know what other cpu's might work in the system plus if the system is still under warranty that kind of a modification would most likely void the warranty.

Q: But CNet has a Tutorial

If you could swap the processor by eg. a 1.8 you will not feel the difference.
The laptop processor will be expensive and the skills/risc to swap it will be high.
A laptop is not meant to upgrade a lot by it's nature, and actually if you're smart a desktop is neither.
Experience learns that upgrading is costly and rarely leads to big results.
If you need more than 1GB of ram, you need a good software reason for that.
Eg. you're running a heavy cad application like ADT.
Otherwise you will not notice the difference in your applications.
The real world: you can have a similar result by optimizing your windows setup: cleaning, defragmenting disk & registry, remove unneeded applications.

It really depends on how much money you want to spend. Yes upgrading the processor is possible; as well as upgrading the memory. Chances are though if you're inexperienced, you will want to take it to a shop that can do this for you. I have done this for clients in the past.

Price List of processor type mobile.