Fails to open Windows Explorer from Sandboxie app (since build 25136.1000)

[ojo11]

Describe what you noticed and did

Schedule 25174 build.
Install the application.
Launch the application.
Give Keyboard input alt + b + 1 + r + w
Observe.

Actual Results | App failed to open explorer.exe

Expected Results | Application should be able to work without any issues.

How often did you encounter it so far?

100% repro

Affected program

Windows Explorer

Download link

Not available

Where is the program located?

The program is installed both inside and outside the sandbox.

Expected behavior

Application should be able to work without any issues.

What is your Windows edition and version?

Windows 11 25174

In which Windows account you have this problem?

A local or Microsoft account without special changes.

Please mention any installed security software

Windows Security

What version of Sandboxie are you running?

5.57.7

Is it a new installation of Sandboxie?

I recently did a new clean installation.

Is it a regression?

No response

In which sandbox type you have this problem?

In a Standard isolation sandbox (yellow sandbox icon).

Can you reproduce this problem on an empty sandbox?

Not relevant to my request.

Did you previously enable some security policy settings outside Sandboxie?

No response

Crash dump

No response

Trace log

No response

Sandboxie.ini configuration

No response

[isaak654]

So which application is accepting that keyboard input? Any screenshot or video would help too.

[ojo11]

Hello Isaak We are using keyboard for shortcut to reproduce the issue.

Below are two ways we can reproduce this bug:

1. Install the application from dumps.
2. Launch the application.
3. Give Keyboard input alt + b + 1 + r + w
4. Observe
   (Or)
5. Install the Sandboxie application from vendor site
6. Launch Sandboxie control
7. Goto Sandbox option -> DefaultBox -> Run Sandboxed -> Run Windows Explorer
8. Observe

[ojo11]

[isaak654]

The weird thing is that it doesn't happen on the current Win 11 RTM 21H2 (except the opening delay in #1127), while on Win 10 it works fine.

Update: the last Win 11 build where Explorer started is 25131.1000, since 25136.1000 it hangs.

[ojo11]

do you need anything else from us?

[isaak654]

Any help that could lead to a fix would be appreciated.

[isaak654]

[DavidXanatos]

I have investigated the win UI issues a bit and it seams that it is enough not to rename a couple of window classes namely:
NoRenameWinClass=Windows.UI.Composition.DesktopWindowContentBridge
NoRenameWinClass=Windows.UI.Core.CoreWindow
NoRenameWinClass=Windows.UI.Input.InputSite.WindowClass

Unfortunately NoRenameWinClass does as of 1.3.3 not support wildcards such that NoRenameWinClass=Windows.UI.* would do the trick,
I'll add wildcard support to the next build, probably 1.3.4 and add the required value in one of the default templates.

about the instructions from the first post "Give Keyboard input alt + b + 1 + r + w"
when i do that nothing seams to be happening, nieder in a sandboxed nor in a unsandboxed explorer,
i also tried switching the system language to english, what is supposed to happen?

[DavidXanatos]

please test build 1.3.4 https://github.com/sandboxie-plus/Sandboxie/releases/tag/1.3.4

[ojo11]

Thank you! I've shared it with the team.

[Uj947nXmRqV2nRaWshKtHzTvckUUpD]

confirmed - explorer finally works on v1.3.4. good job!

[isaak654]

While this issue is fixed, there is a new one between the hardened sandboxes and Windows 11 22H2 RTM: #2341