Personal PC

I have an old personal computer at home. Her speed really slow right now. I am so tempted to sell it or do trade in for another set of personal computer. However my hubby stops me from doing so. He commented that he can actually speed my computer up by adding some memory or doing some upgrade. Well, I ask him do it soonest possible, so that can pass it down to my primary kids. Then they can do school project all by themselves, instead of asking for my help.