- take a screenshot (press 'prt scr' on keyboard)
- open paint
- paste image into paint (ctrl-v)
- save image as .bmp
- make an account on imageshack
- upload your image
- when you want to post the shot(in forums), click the 'add image' and 'add centre floating image'
- type in the address of your image that imageshack gives you
You've got yourself a screenshot!