First thing when we upgrading any laptop computer we need to upgrade the memory. If the laptop has the memory it was bought with it is possible that the best way to upgrade it is install more memory.
How to install or replace laptop memory on particular model you can find on the internet just type how to upgrade memory plus laptop model you will definitely find the step by step guide. On this site we describe how to do it in general.
How to upgrade a laptop processor. To upgrade laptop processor I think this would be a unnecessary work. It is because usually the motherboard of laptop is designed to have a few frequencies. Yes it is possible to change the frequency and put there faster processor, but the speed processor communicates with RAM will be the same. So it will by barely noticeable.
How to upgrade laptop graphics. There are just a few laptop models where you can take out a graphics card and place there another one. Usually graphics card chip is integrated in the motherboard so there is no way to replace it. The only way to upgrade the is to dedicate more laptop memory to graphics card. It is done in BIOS. There are a settings how much of RAM is dedicated to graphics memory. In every laptop it is in different BIOS place so we do not describe it further.
How to upgrade laptop hard drive.
This is not the easiest task and if you want to save data and even operating system it needs to be used special software. Special software to transfer everything to a new hard drive or in other words make a mirror copy would be Norton Ghost... 
If you simply want to replace a hard disk with another one and install fresh Windows then it is not complicated work. First you new to get an instruction how to take out the hard disk from your laptop. Simply search the internet with phrase disassemble and your laptop model. There will be a part where it explains how to take out the hard drive. Usually the hard drive is located underneath the laptop and can be accessed by unscrewing couple of screws.
 Probably you are familiar with laptop hard drives. If not there is one guide which shows the difference between different hard drive connectors. It is important before you begin to look to buy a new hard drive to know which drive connector uses your laptop. There is two connections used today. SATA and ATA or PATA. ATA connection is found on older laptops. SATA connection started to use in widescreen laptops.