Minimize all windows, press the "Print Screen" button, open MS Paint, got to Edit, then Paste. You will see your desktop there, save the file as .JPEG and then you can post it as an attachement.
Minimize all windows, press the "Print Screen" button, open MS Paint, got to Edit, then Paste. You will see your desktop there, save the file as .JPEG and then you can post it as an attachement.