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

ayi

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?

ayi

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).

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