Has various programs for trial use and free, check it out.... but.....
Arjonius and PokerPrincess have the easiest way, however, with the newer computers, you just do the following:
1. Hit the "PRT SCN" Button located at the top right side of your keyboard, there is a row of 3 keys, its the one on the left.
2. Open Paint - Start, All Programs, Accessories - Select "Paint" (Double click the icon)
3. When the program opens select "EDIT" from the Top Menu (Second choice from the top left) and the word "PASTE" (The 5th choice down from the top) should be highlighted, click the word PASTE, and the image will be transferred to the program "PAINT" where you can edit it, size it and then print.
Hope this Helps,