The answer to that is "It depends."
Each person uses their computer differently, so different upgrades would be best for different people. Some people need new videocard. Some people need a new hard drive. But most people need more RAM (commonly referred to as "memory").
RAM is not going to make your computer "super-zoomzoom-fast". But under most circumstances it will make a noticeable difference in how fast your programs open up. And THAT is what 99% of home computer users classify as "making my computer faster".
You see, when you open a program, whether its a word processor, Paint, MineSweeper, or any other window, your computer uses the RAM as a sort or temporary "holding area" for the information it needs. As the RAM is filled up, it becomes backlogged. If you have more RAM, then it holds more information so that your programs open faster.
The vast majority of computers when bought from major electronic stores come with 1GB (gigabyte) of memory. If your computer is more than 2 years old, it probably has even less.
What is the recommended amount of memory?
As much as your computer will hold.
Seriously, RAM is dirt cheap now compared to the past, and your can pick up 2GB of memory for under $30 at just about any electronics store.
There are a few considerations you need to know. Some older computers can only hold a certain amount of memory....2GB is the usual standard for computers more than 4 years old. There are also different sizes of RAM and you need to be careful to get the right size.
Also, unless you are running a 64-bit operating system (if you have to ask what this is, then you don't have one), you can only use a maximum of 4GB of memory.
Don't ask me why that limitation is there, because you need a PhD in physics, 3 years of advanced calculus, and a 12pack of beer to understand it.
How do I get more memory?
The best way to do it is:
1. Take the side of your computer off. Generally speaking, the left side (as you face the computer) has screws on the back that will let you take the side of the computer off.
2. Remove the ram from the board in the computer. You can see the picture below what the RAM will look like. On the both ends will be small latches. Push them both down, and the stick of RAM will pop out.
3. Take the stick of ram down to your local electronics store and tell them you need more ram that is the same type as what you have brought in.
4. Put the new sticks in the computer using the reverse process. Be sure that the little latches on the ends click down. The sticks of RAM have notches in them so they can only go in one direction. Do not force them as you could break them.
Is there any danger to taking this RAM out of the computer?
Oh yesssss......it may kill you.
I'm joking, you will be perfectly fine....but you may kill your computer. You do need to take some precautionary steps before attempting this. First, unplug your computer from the wall. Then, press the Power button once again (even though your computer won't turn on). This will dissipate any electricity that is hanging around inside of it.
Also, if you have any static on you, your computer will die. Do not operate on your computer while it's on a carpet. It's best to place it on a table or desk. And be sure to touch something metal before reaching inside the computer to remove/replace the RAM.
