If you're getting an “Application not found” error when trying to open folders on Windows (double-clicking a folder does nothing or shows an error), it's likely due to a broken folder association or registry issue.
I recently ran into this and finally resolved it using a simple registry fix. Here is how to fix.
Solution: Restore Folder Association via Registry
You can fix the issue by resetting folder open behavior in the Windows Registry.
Steps:
-
Open Notepad.
-
Paste the following text:
Windows Registry Editor Version 5.00
[HKEY_CLASSES_ROOT\Directory\shell]
@="none"
[HKEY_CLASSES_ROOT\Folder\shell]
@="none"
[HKEY_CLASSES_ROOT\Drive\shell]
@="none"
-
Save the file as:
fix_folders.reg
(Make sure to choose “All Files” under "Save as type")
-
Right-click the file and choose Merge.
This registry fix resets the default shell behavior for folders, drives, and directories—restoring proper association with explorer.exe, the default file manager for Windows
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