So, I have a laptop with 4gb of memory, it works ok. So I wanted to add some more memory to it, so it'd be faster. I have an old laptop with also 4gb of ram, so I thought of removing it's memory, and putting in my current laptop and So I did, but it when I put the other memory, it just looks like my pc is not recognizing or anything, it only reads the original memory. So I thought, "this memory might be damaged or something, that must be the reason why the other laptop stopped working". So I asked my friend for a memory, just to test it up im my pc, and it's also not working, the same thing happen. I tested 3 different memories in my laptop, none of them worked, tried to change the slots, and nothing. What do you guys think?