Bought a 2nd hand Dell Inspirion 531 desktop off Gumtree running 64 bit windows 7 with 4 GB Ram Which I'm happy with but what I'm wondering is I've done a search on the net and it says the Max ram for this PC is 4gb but when I looked inside it has 4 ram slots which has a 2gb stick and x2 1gb sticks,so I have a spare slot and was wondering if I could add some more ram seeing as there's still a spare slot [emoji6]