Comment supprimer a par défaut program association for fichier types in Windows 7?

[ForumBot]

I somehow have set the default type de fichier association for a type de fichier in Windows 7. It doesn't appear to be possible to delete it from the "Change the type de fichier associated with a extension de fichier" options screen. Est-il possible de remove it?

[ForumBot]

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Trouvez le extension de fichier in question under this key in le registre:

***HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\FileExts***

Deleting the sub-key with the same name as the extension you want to un-associate will delete the default program association. In older Windows versions, you'll have to kill and restart `explorer.exe` for this to take effect (the change is instant as of Windows 10 64-bit).

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In most cases, you will also need to remove the same sub key from **HKEY_CLASSES_ROOT** aussi.