You have a bunch of extra stuff running. See your processes = 76. I have w7 pro 64bit, currently at 56 process with just chrome open but this is less than most people as I will shut off anything I'm not using.
How many other programs are you running at the same time. I noticed that you had 7 active programs running (based on the number of icons on your task bar) plus a gadget in the upper right corner. I would say that your memory usage is about where it should be with that many programs running.