HeyItzAxel

So I have a very small hard drive, about 60 gb, so I use a large external drive for all my stuff. I was making a star wars background and when I was a few minutes in, I tried to merge layer down, but it said I don't have enough space to do that and some other errors and then closed the program completely. So just as a warning, make sure you have enough space on your hard drive before you make any big pictures. Developers fix this please

Hi, i'm trying to install paint.net and i can't install it because i get error 1603. I've searched everywhere on the internet and can't find a solution. Can someone please tell me what the error message means and how i can fix it ?