Strike Ctrl+Shift+Esc; Right click on the taskbar and select "Start Task Manager"; or click on "Start" and then type "taskmgr" in the search box. Right-click on it and select "Run as Administrator".
Click on the "Performance" tab.
Click on "Resource Monitor".
Click on the "Network" tab. Right under it is the list of all processes using your connection.
Creighton Samuiels wrote:
Or if you are truly looking to get stuff done on minimum data; you can turn off automatic image loading completely or use a non-graphical browser. (I didn't know that the web had photos until about 1995, because I did almost everything in Lynx) Such non-graphical browsers include Lynx, Links and Links2 for the GNU/linux and Mac OS X set, and WebIE & ELinks for the Windoze users.