Can I upgrade my CPU?

Ive had the privilege of completely trashing about 10 laptops in the store that i worked at. after doing this i have conceded the following:
1. laptops are extremely hard to take apart without doing serious damage to either the case or the components.
2. one of the most complicated things is to find and or replace all the tiny and i mean tiny screws that are in a laptop.
3 the replacement of a laptop processor is not cost effective as already mentioned.
4 most laptops these days come with a higher equivalent if this is so with your laptop i means that the processor is interchangeable with that higher series.

if your laptop has a higher 'i' series model usually what the company does is install a processor socket this saves them the time of having to solder in the new chip for every different model.
if you do have your heart set on upgrading your processor it can be done. it is just, well....not really worth the time. i went down the same path until i realized that to install the new processor i would need a new heat sink a new internal psu and a complete bios update and reconfigure (i like personalized bios settings).
if your machine has a G1 socket it does support an i7 proccesor. so you could look into it.
Good luck and i hope you are successful in what ever you decide to do...

I wouldn't recommend it, even if the board would accept a higher processor. Your laptop was designed to handle the heat from your current processor. If you switch to a processor that may generate more heat, you could end up damaging the laptop.

If you want to be able to upgrade your parts, you don't buy a laptop, unfortunately...so keep that in mind next time around.

The 5400 rpm hdd is without a doubt the bottleneck in your system. The components all need to "balance" in function or you're just wasting money. I'd love to have the latest cpu as much as the next guy. However outside of video editing and other processor intensive tasks, it really wouldn't make a whole lot of difference what cpu you were able to pop in there.

I'd say badger906 is right on the money when suggesting a small ssd and an external hdd for budget reasons. In your situation the upgrade path should be ssd first, then ram and processor last, if at all. You really only need enough ssd for OS and Programs, with as much overhead as you can afford for wear-leveling. Seriously, the difference in speed and responsiveness will be much more than you would ever get from a cpu upgrade. The cost would also be somewhere around what you would spend for a middling i7, even less if you shopped around some.

Hey guys. Thank you very much for all your suggestions and advises, appreciate them a lot !!!
So it's seam that for the moment I'll just upgrade my RAM till 8Gb and that's it. Maybe latter I will consider to change my HDD to SSD, but defiantly not now )))
Thanks again very much
The case solved !!!

I don't know about laptops being hard to work on, you do have to have some skills and a steady hand to work with those small screws but I don't find it that hard. I've totally rebuilt about 5 of them. I buy them broken, fix them, sell them, usally the people I sell the new one to have an old one I'll take 50$ off the price of the new one if they throw in there old one, fix that one, ONCE BIG CIRCLE. Been making decent side money doing this. I still have no clue or skills on how to change out the CPU in this 4420 or if the G1 989 socket i7 or i5 would work. Motherboards are one thing I currently have no skill with. If anyone has a clue as to where I could get an i5 or an i7 CPU cheap that would fit my laptop that would be cool. As to SSD drives, I've heard so much bad stuff about them. Eventually they all choke and die after a few years don't they? They are pretty much massive flash drives aren't they? I've read quite a few articles saying they only have so many times they can be booted up as to a regual HDD drive, I have one in an Inspiron 6000 that's 10 years old and runs perfect. I think I am going to try out a 120gb SSD in my probook before trying to swap out the CPU. Seems like a lot of people agree that would make the difference in this laptop.

For more information, please refer to the following link regarding the upgrade project for Intel® HM55 Express Chipset.
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I have an ASUS A52JK which also comes with Intel i5 430M CPU, which is shown in the link below:
https://www.asus.com/Notebooks/A52JK/

The same laptop also comes with other types of processor, which are:
1) Intel i5 430M/450M/460M/520M/540M CPU
2) Intel i3 330M/350M/370M CPU
3) Intel Pentium® Dual-Core P6000 CPU

I am thinking of upgrading the CPU of my laptop to Intel i7 940XM or i7 640M. I have checked the TDP and CPU ID for Intel i5 430M, 640M and Intel i7 940XM. The TDP for i7 940XM are higher, which is 55W while the TDP for Intel i5 430M and 640M is 35W. The CPU ID for Intel i5 430M is 20652, the CPU ID for Intel i7 540M is 20655 and the CPU ID for Intel i7 940XM is 106F1.

After reading the successful stories from the first link that I give above (and ignoring the unsuccessful stories ), I feel like I want to go for i7-940XM. If i7-940XM doesn't work, then I will try i7-640M (or lower). If the i7-940XM, works but have overheating problem, then I will try the i7-840QM (or lower).

For more information, please refer to the following link regarding the upgrade project for Intel® HM55 Express Chipset.
Access denied

I have an ASUS A52JK which also comes with Intel i5 430M CPU, which is shown in the link below:
https://www.asus.com/Notebooks/A52JK/

The same laptop also comes with other types of processor, which are:
1) Intel i5 430M/450M/460M/520M/540M CPU
2) Intel i3 330M/350M/370M CPU
3) Intel Pentium® Dual-Core P6000 CPU
I am thinking of upgrading the CPU of my laptop to Intel i7 940XM or i7 640M. I have checked the TDP and CPU ID for Intel i5 430M, 640M and Intel i7 940XM. The TDP for i7 940XM are higher, which is 55W while the TDP for Intel i5 430M and 640M is 35W. The CPU ID for Intel i5 430M is 20652, the CPU ID for Intel i7 540M is 20655 and the CPU ID for Intel i7 940XM is 106F1.
After reading the successful stories from the first link that I give above (and ignoring the unsuccessful stories :P ), I feel like I want to go for i7-940XM. If i7-940XM doesn't work, then I will try i7-640M (or lower). If the i7-940XM, works but have overheating problem, then I will try the i7-840QM (or lower).