So I've had my MBA for just over a year I believe. It was a month or two before the revised body came out so I could be longer. I have noticed over the last month or so that it has been running painfully slow. Items take forever to open, webpages go white after I click away from them and load slow (internet speeds are very good), any video is chopping, etc. Does anyone have ideas how to 'refresh' it? Should I reimage? Any ideas? Thanks.