I have just installed Chrome browser on my Macbook Pro, OS X El Capitan, after installing Chrome,every time i launch the app it mounts on the desktop and asks me to move chrome to application folder,which i did !!
How are you launching it?
It seems it is still launching from the installer disk
If you double-click the icon in the Applications folder you should be fine
But you need to eject the installer disk image and delete it to avoid any confusion