Explorer crash when right‑clicking inside Windows Libraries (caused by KuShellExtension)

[CoolRaoul]

Hi,

I’ve run into a repeatable Explorer.exe crash and tracked it down to AllDup’s shell extension.
Whenever I right‑click inside a Windows Library (Documents, Pictures, etc.), Explorer crashes instantly.
Right‑clicking the same folders outside the Library works fine.
After some testing with ShellExView, I found that disabling this extension fixes the problem:

Code: Select all

KuShellExtension-{72F6A03F-7B17-4E65-AE37-666FC9024FA2}
C:\ProgramData\AllDup\KuShellExtension64.dll
Context Menu Handler
Targets: LibraryFolder, LibraryFolder\background, .library-ms, Directory, Drive

Steps to reproduce:

• Enable KuShellExtension (default install).
• Open any Windows Library.
• Right‑click on a folder or on the background.
• Explorer.exe crashes.

OS : Windows 11.

Disabling the extension makes the crash disappear completely.
Just wanted to report it in case others hit the same issue or if it can be fixed in a future update.
Thanks!

[Administrator]

Which version of AllDup do you use?

[CoolRaoul]

Which version of AllDup do you use?

4.5.72
And KuShellExtension64.dll do noy have any version information according to it's file properties.

[Administrator]

Sorry, but we cant reproduce this problem here using Win11 [Version 10.0.26200.7462].
No crash after a right-click on any of the Windows Libraries or a folder inside a library.

[CoolRaoul]

thanks for checking.
I understand you can’t reproduce it on a clean Windows install (and I can't either : I tried on a VM whitout success)
However, I captured the crash with Process Monitor and Explorer.exe always crashes immediately after loading KuShellExtension64.dll.


There are probably some specificities on my environment which cause the crash

Can you simply explain what features I'll be missing when disabling that shell extension then ?

[Administrator]

Can you simply explain what features I'll be missing when disabling that shell extension then ?

You will have no AllDup-context-menu at the windows explorer. Thats all.

[CoolRaoul]

You will have no AllDup-context-menu at the windows explorer. Thats all.

not a big deal for me.
Thanks!