Hi all, I'm new to the mac world, purchased my first MBP in March earlier this year. I believe its the older version not the latest one with speakers at the side. I downloaded a few programmes like keynote and pages and bittorrent and skype but after awhile i realise my computer is starting to lag. Like Finder can sometimes take 7 seconds to open up? Opening pages takes maybe 10-15seconds? Can anyone tell me what's going on? I checked my activity monitor its showing me that my free memory is fluctuating around 500mb. I have 4GB ram in this computer. Appreciate all help!