Although the memory usage you've shown is somewhat normal I think you might be able to pare that down a bit by checking to see if Windows Media Player sharing is turned on. It is turned ON by default. (A big glutton for system resources.)
Fire up Windows Media Player and then click on the arrow located below the Library tab. Now click Media Sharing.
In the Media Sharing dialog box, deselect the Share my media check box.
That should free up some available RAM for you.