
1. Right click on "iNstRuCtioN.nfo" file
2. Select "open with" and select "Choose default Program.."
3. Browse and find Notepad (or wordpad)
4. And (for windows 8/8.1) check the "Use this app for all .nfo files" box 
(for windows 7 ) check the "Always use the selected program" box 

OR

1.Create a "text document" on desktop (Just right click on the desktop & select "new" & select "text document")
2.Drag and drop that "iNstRuCtioN.nfo" file into the created txt file (which is on desktop).