I have an old MacBook Pro aluminium unibody but I have started having problems with it. I haven't been using the machine for over a year but last night switched it on to use. It was running well until today when it is running sluggish. When I try to open program's or folders the coloured spinning wheel appears and spins for for a long time. I have tried switching it off form the power button and rebooting but I still get the same problem. I have tried selecting "force quit" but I cannot do that without the spinning wheel spinning for ages. I am running Snow Leopard 10.6.8. Please advise EDIT - pressing alt, command and esc keys together for a few seconds seems to help but unfortunately it goes back to the spinning wheel when trying access folders or programs. Could this be a problem with the RAM memory in my MacBook Pro?