Firstly, how to upgrade memory in a laptop will be introduced. There is a special memory compartment in the computer, where laptop memory is placed, usually in two slots. You need to have a screwdriver, to open the memory compartment. You have to unscrew a couple of screws with the screwdriver.
How to upgrade laptop memory
Upgrading laptop memory can be pretty easy. Normally, you will have to use the screwdriver, and a new memory module, of course. There are a few different types of laptop memory. SDRAM is the first one. It is the older memory type and usually is in older laptops, such as Pentium II. DDR1 memory is different from previous one. There also is DDR2, which is current nowadays. It is different from DDR1. It is not very convenient, but, still, it is used. At the moment DDR3 is also circulating on the market. It is different from DDR2. So, all those DDR types are not interchangeable. To identify which memory type is on your laptop, you should use software SIW. It will show the memory’s type and size.

How to upgrade PC memory
To upgrade PC desktop computer memory, firstly, similarly as with the laptop, we have to identify which memory type it has. PC memory modules usually are bigger than laptop memory modules. But the type of all of them (SDRAM, DDR1, DDR2 and DDR3) is the same. Usually, if the memory is DDR, we will find it written in the markings. Here we can use SIW software to identify memory type, as well as with a laptop computer. After we find out the memory type, we should buy it. A good place to buy computer parts is eBay. We also can check various online retailers, such as buy.com or tigerdirect.com. There are always fewer problems when buying from big online retailers, because retailers on eBay do not provide enough support.

How to install memory upgrade to the computer
The memory in a different laptop is almost always located in a different place. You have to find the disassemble manual of the laptop and find out where the memory compartment is. Usually the memory modules are located underneath the laptop and to access it, it is necessary to remove the plastic cover. You have to remove any cover and if this one is not the memory module compartment, you have to remove the other one.

How to install memory upgrade to the desktop computer
Installing the memory upgrade to the desktop computer is quite simple. We have to use a screwdriver. Firstly, we will have to remove one of the computer’s case covering sides. It is done by unscrewing a few screws on the back side of the PC case.
When we will have removed the cover, it should look similar to this:

Usually memory modules are located near the processor. The processor can be recognised from a big heat sink and a fan on the top of the heat sink.
To remove the memory you simply have to push the sides of small "arms" that are holding memory modules. The module will pop out from the slot, while pushing.