EOS Utility is only to support a connection to the camera, either to copy files down to the PC, perform remote tethered shooting or to change a couple of camera settings that can not be done through the camera's own menu system. It is not designed as a raw file viewer or editor.
To open and view the raw (.CR2) files you will need a raw image viewer such as Canon's Zoombrowser or simply install Canon's Raw Codec to allow viewing through Windows (I'm assuming Windows usage) normal utilities like Windows Explorer and Picture Gallery.
To open and edit (also view) the files you will need a raw editor. Older versions of Zoombrowser have a tool called RIT (Raw Image Task) included that allows raw file editing. Nowadays only DPP supports raw editing within Canon's software suite. There is a link within Zoombrowser but it simply opens up DPP.
There are many other raw viewers/editors such as Lightroom, Photoshop, Bibble, BreezeBrowser, CaptureOne etc., which cost, or Picasa, RawTherapee and Gimp, which do not.
If you have no interest in working with raw files then you may as well change your camera settings to save to JPEG instead of raw. If you want to shoot raw, just in case, but easily have JPEG files available as well then either you can shoot with the camera saving to raw+JPEG or use DPP to batch convert all your raw files to JPEGs just as though you had shot them that way in the first place. DPP and BreezeBrowser are the only raw editors I know of that read, understand and apply the incamera settings for picture style, sharpening etc.. All other raw editors will just do their own thing and ignore whatever you set in the camera.
