I have a laptop and it needs more RAM. If you were to go get it at a store, does it add it to your current RAM , or does it replace it? It seems logical that it replaces it. Is it easier to get it done professionally or to do it yourself?? And if it is easier to do it yourself, how do you do it safely???
Having never actually owned a laptop (I need a gaming rig), I may not be the best source for this info, but I've seen enough laptop's being repaired at my workplace to know that most laptops come with one dimm (ram stick) and have a free slot available.
It depends on your model of laptop, the year it was made, and the current amount of ram. The advice I usually give is to return to the point of purchase and ask them for advice. The company/store would have the info for you (if you have an available slot, what type of ram will work), and should have a technician on hand to open up the laptop and install it correctly.
If the laptop is under warranty, it is highly advisable to follow this route. If not, and you feel comfortable enough or know someone who does - give it a go!
RAM has come down in cost so much (even for laptops) that it may make sense to remove the old RAM and put in much denser RAM into both slots. This will extend the life of the laptop and is the cheapest performance boost you cna buy.
It is better to give your laptop to professional for upgrading cos a laptop is not like a normal PC so u don know when it may go bonkers. Laptop is usually harder to upgrade then a noraml PC. I have some friends who to increase thier har disk space on their laptops but I can't be done on laptops. So u better hand it over to the pros.
You don't need to take your PC to any store to identify what RAM you need. The above mentioned free program CPU-Z can do that for you. Actually putting the stuff in can be more difficult, you might want to have a professional do that.