Edit your WAMP files with Notepad++ instead of notepad
This is a simple fix, but one that can be frustrating if you aren’t sure where to make the changes.
I used “open with” and made Notepad++ the default to open these file types…
...So why is in not working?
At the very top of this file you will see a line that reads ‘editor = “notepad.exe”’
To change Notepad++ to your default editor in WAMP, you simply comment out or delete this line and replace it with your Notepad++ location like this ‘editor = “C:/Program Files (x86)/Notepad++/notepad++.exe”’.
Notice the forward slashes instead of back slashes.