MSE is pretty light on resources i thought.
to be honest i think there are too many things going on in the background for the ram i have , then when i open something that uses a fair bit of ram it slows things right down. having said that it wasn't too bad a couple of weeks ago, this is a recent thing that leads me to believe it was the recent updates. i would do a system restore but i will lose a lot of changes , so in a few weeks i will get some more ram , in the mean time i have cleaned it and run mbam, super antisypware and ccleaner. alls good just sluggish for now.