Instructions
Turn your home computer on, and open the photo editing software you use to edit your pictures. If you do not have a photo editing program, consider using Adobe Photoshop or the free programs GIMP or Paint.net that are very similar in function.
Click "File" in the navigation bar of the program you are using, and select "Open" from the drop down menu. Use your cursor to navigate to the folder with your pictures, select the picture you want to edit and click "Ok" located in the bottom right of the window to open the picture.
Click "Enhance" in the navigation bar, and select "Adjust color" from the drop down window, then select "Adjust Hue/Saturation" from the new window. A new window will appear in the editing screen with two slide adjustments, one for saturation and one of hue. Use you cursor to click and hold on the adjustment tab and move the tab to increase or decrease the amount of saturation until the picture is adjusted to your liking.
Release the adjustment tab, and the program will adjust the picture. Click "File" and select "Save as" from the drop down menu. Give the edited picture a new name and save it to your computer's hard drive.