If you want to open a file containing ASCII art, then you probably be able to do so with your Windows computer. There are some cases in which the NFO files can`t be displayed, and you need a special tool to do the job.
At this moment you may find this new DAMN NFO Viewer pretty useful. If you have a hard time opening some documents containing ASCII art, then you should try this tool out and see if you manage to fix the issue. If you have Notepad, then you probably set the problem pretty fast, but if you want some additional features besides the ones you find in Notepad, then this tool can be the right choice for you.
This tool is lightweight and ready to be used. It is possible to view file formats with this tool, and the best thing about it is the fact that your experience is going to be customizable.
You can quickly change the appearance of the tool the way you want. You can use this tool to do the job.