If something pops up that you've never seen before, just search online for what it is. If you don't know what System Information is, literally search "what is system information windows" and find out. This can be done for so many things and you don't have to wait for an answer.
Additionally, in the "Open with..." dialog on Windows, you can see that System Information is the default application for .nfo files. Just change it to Notepad or something and you'll never have this problem again.