On Windows Operating System but default all .txt extension files (.txt) are opened in Notepad Application, but Notepad lacks advanced features if you want to manipulate the text in the file - such as - Find and Replace using Regular Expressions, Syntax Highlighting, Indentation, XML, JSON validation and so much more. So if you are a programmer or a Computer Science student I am sure you would like to open text files in Notepad++.
Steps: Make Notepad++ an Default Application for .txt file
- Right Click on any .txt file,
- Click on Properties,
- Click on the button Change... beside Open With:,
- Now Click on More apps... and select Notepad++,
- If you do not see it in the list click on: "Look for another app in PC",
- You will find Notepad++ App installed in either of Program Files or Program Files (x86) based on 32-64 bit version.
- Select notepad++.exe application
- Now all the .txt files will open in Notepad++

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