Resizing Images

After I went thru a folder of pics, about 30, opening every one one at a time, resizing it and saving it somewhere else, then opening the original folder again to do the next...... lots and lots of dull clicking. So today I looked onling and found an update to Windows 7 that once I installed it right click on the image file(s) then click resize and it saves it with a differentish name so you have both.