In a desktop you just slide off the cover and put the ram into its slot but in a laptop you will have a screw in the bottom. unscrew it and there should be a lever to release the modular and you can insert in an open spot... if you are going to attempt to do this either see a specialist or understand the consequences.
Just the size and compatibility, Laptop RAM is shorter- length and wider- height (mostly unless the desktop RAM is something like the Corsair Vengeance gaming RAM) and sometimes may have a different PIN count ie, 204 instead of 240 being desktop. Laptop RAM wont fit in a desktop and vice versa. Laptops user smaller RAM because they are compact machines and need to fit as much stuff into a small place as possible (Hard-Drive 2.5" [also smaller] and sometimes Mobile additions of graphics card [Radeon HD6770M/ Nvidia GTX560M M meaning mobile])
No lol
It is certainly not possible because laptop RAM has a different notch pattern and number of pins. Also, be sure not to mix different types of RAM such as DDR, DDR2, DDR3, RDRAM, etc. together. Actually, it IS possible, but you need an adapter... google 'notebook to desktop memory adapter'
The RAM that is used for a laptop is not the same as the RAM that you would use in a desktop PC. The RAM that is used for a PC is much too big to be used in a laptop, so a laptop has to use a much smaller RAM card which is called SD-RAM.
Neither is "greater". Laptop RAM is generally provided in a smaller package, called SODIMM, while desktop RAM is generally provided in a larger, cheaper package called DIMM. For the most part, any memory you can get for a desktop you can also get, more expensively but otherwise effectively identical, for a laptop.
No, not usually. Check with your motherboard specifications to see what RAM is needed and the maximum RAM your motherboard can handle.
The first major difference between the two is going to be that the socket for the processor is different between a desktop and a laptop. Same also goes for the RAM. Also laptop manufactures will use lower powered chipsets than you would find in a desktop typically.
Ram upgrades are easy to do if the the computer is a desktop. If your computer is a laptop then it will be a lot harder to switch out your ram. However desktop computers are much easy and can be done at home.
Modern laptops use what are called "SO-DIMM" modules. These are much shorter in length than desktop modules, and are not electrically or physically compatible with desktop memory. Some older laptops did indeed use desktop modules, but these are in the relative minority.
If your laptop has available RAM slots then you can add it. Also you have to check how much of RAM your laptop can support. It's not more then 2 Gb. You can replace the RAM which you have now by RAM with more capacity. PS Some laptops do not allow to change or upgrade RAM (mostly old models and ASUS Eeee).
Assuming this is a serious question, I will answer it. Desktops are big, laptops, well, fit on your lap.laptop are portable but desktop are bigger.
The way you disable a RAM slot on a desktop is to take the memory card in it out of the computer altogether. On a laptop, I don't know. It depends on the maker of the laptop, the model, and several other factors.
The cost of 8GB of RAM depends on the speed of the ram, the vintage of the computer it will go into and of course whether it is for a laptop or desktop computer.