*I CIRCLED IN RED WHAT YOU CLICK*
and open the image you want to unpixel
Then open a new layer and go to the line tool
Then change the size of the line to 1
and change the fading opacity on your lines to "Pixelated"
Then just outline your image
when you finish that
click on the layer named "Background"
and hit the red X that is on the layers tab
*REMEMBER YOU HIT THE RED X AFTER YOU CLICK ON THE BACKGROUND LAYER IF YOU DONT DO THAT LAST THEN YOU HAVE TO RESTART THE IN TIRE PROCESS*
Then after you finish all of that just select your outline image hit crop
but remember to color the background in white!
Hope this helped
for that part i circled in red what you click to do that
the little button next to the Solid Color thing you click the button above that and it should look blocky after you click it
i dont have that paint cause i have windows live
you download the program called Paint.net at Paint.net
watch a youtube video cause it's kind'a hard to install