https://www.amazon.com/Presario-CQ57-229WM-CQ57-250SV-CQ56-115DX-DDR3-1333MHz/dp/B008O52NEO
You can upgrade the RAM to 8GB, it is supported. Has two DIMM slots. 2 4GB sticks is possible. Pretty cheap for what RAM prices dang are. You will definitely, definitely, enjoy this upgrade bud. It will be much faster. I recommend upgrading to an SDD someday in the future as well if you don’t have one, if you’re trying to use the most of your laptop.