Why are you showing a stock photo of an acer laptop with WinUAE pasted onto the screen ?
Your previous image
http://eab.abime.net/attachment.php?...0&d=1537525255
Amazon's stock Photo
https://images-na.ssl-images-amazon....L._SL1500_.jpg
Besides, WinUAE including screenshots, doesn't fit exactly onto a 16:9 display, even if it fit the width there'd still be a 42px gap top and bottom