For Windows:
Desktop -- on the keyboard, just press the "
Print Screen" that could be found on the upper-right side of the keyboard
Laptops -- depending on model type, it will require you to press the
Function ( or
FN ) key at the same time with the one key that says
PRTSC
Now, once that's done -- for both types: press the Windows logo on the keyboard, then type
Paint ( alternatively, click on
All programs -- then
Accessories -- then
Paint
Inside Paint, press
CTRL+V to copy-paste the screencap; then from there you can use the Select tool ( to select what part of the image you like to focus on ) then click on the Crop ( to remove the excess parts )
* -- once that's editted,
CTRL+S to save the image in either JPG/JPEG or PNG
* If you made an error in editing, you can just backtrack a step by pressing
CTRL+Z
Once that's saved, you can now upload that screencap picture onto your choice of image host site ( ex: Photobucket, TinyPic )