So my missus who knows even less than me about it asked me to fix her Dell 3510 laptop as it was working as slow as a snail. After messing about with it for several days I've come to the conclusion that it hasn't enough memory. It should have at least 8gb instead of the 4gb it came with.
I unscrewed the back however I can't for the life of me get the casing off. I Googled the problem and it says to use a plastic clip to pry it off which I don't have. Is there anything else I can use instead?