I have a Compaq Presario SR2011WM that I picked up for $5.00 and I have a HP mobo with a CPU on it still. The Compaq uses a Celeron. I think the HP has a AMD in it. I no longer have the tower the HP came in so I forget what the CPU was in it. Would I beable to take the HP CPU off and place it inside of the Compaq? I have never done anything like that before. I have never changed out a CPU before.