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I want to make all unknown files open using notepad++ by default (without having to select notepad after windows asks). I found this thread, but the answers were not very helpful.

How do I associate all unknown file types with notepad++?

How would one accomplish this?

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  • I think this is useful enough that it warrants having the solution in an actual answer instead of having it hidden away in the comments.
    – berala
    Sep 17, 2021 at 23:27
  • Does this answer your question? How do I associate all unknown file types with notepad++?
    – Toto
    Sep 18, 2021 at 9:35
  • I already linked that question in the question body, but none of the answers actually work. There is a comment that works, but people who see the question will look at the answers and find that they do not work.
    – berala
    Sep 22, 2021 at 20:21

1 Answer 1

Reset to default
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  • Open registry editor as administrator.

  • Navigate to Computer\HKEY_CLASSES_ROOT\Unknown\shell\openas\command

You can can copy paste this to the address bar below File-Edit etc.

  • Double click on (Default)

  • Paste the following command C:\Program Files (x86)\Notepad++\notepad++.exe "%V"

  • Click OK

  • Right click DelegateExecute->Rename

  • Change the name to DelegateBackup

Now unknown files should launch using notepad++

This solution is thanks to "rob" in the comments: How do I associate all unknown file types with notepad++?.

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  • This works. As a note, if you have installed 64 bit Notepad++ then of course you need to remove the " (x86)". This should be obvious, but I screwed this up and have been wondering why this wasn't working for me on my new PC.
    – GordonM
    Aug 31, 2022 at 21:13
  • It works, but it seems like it replaces "Open With" by "Open With Notepad++", this means that it's harder to assign a particular file to another program. A better solution would be: Open with Notepad++ on double click, but still keep the default behavior of "Open With" when using the right click menu (To allow picking a different app and checking "Always open with that app"), btw, to revert, just rename DelegateBackup to DelegateExecute
    – Oylex
    Feb 27, 2023 at 16:12

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