That adds "C:\Users\(Username)\Desktop" path which is different and it does not show the extra shortcuts like the screenshot I took in post 8 of the thread. Only the actual files and folders on the desktop.
I think what we need is a shell path like ::{F874310E-B6B7-47DC-BC84-B9E6B38F5903} (that's the one for the "Home" screen ("Accueil" in my screenshots))
Dragging the Internet Explorer icon, next to the path, is worse than the other one (where at least a path showed up):
Also tried from the "Add" button. Doesn't work either.
Does anything useful about where the window came from show up if you hover over the 
icon in the status bar?
(Needs to be done on the window that opens with the Internet folder, of course.)
Any update on this with the above screenshot?
Please try this:
Test./dopusdata/Layouts/Test.oll into the location bar and push return.It should take you to and highlight the file storing the layout. If you open that in the Opus viewer pane (or a text editor, e.g. Notepad), there should be a section for the tab in question, including the path in IDL format:
Can you tell us what the pidl value is?
The same PIDL value should also work if added to /dopusdata/ConfigFiles/exploreroverride.oxc using a format like this:
<?xml version="1.0" encoding="UTF-8"?>
<exploreroverride>
<path>
<dir>
<pidl>?AAAAFAAfeEDwX2SBUBsQnwgAqgAvlU4AAA==</pidl>
</dir>
</path>
<path>
<dir>
<pidl>?AAAAFAAfUOBP0CDqOmkQotgIACswMJ0AAA==</pidl>
</dir>
</path>
</exploreroverride>
(That excludes Recycle Bin and This PC, FWIW. You probably won't want the same values, but it shows the format the data uses.)
Let us know the IDL value and we can try and work out why Opus is trying to handle it. It might also provide a clue about what's asking for it to be opened, although that part could be harder.
The value I found for the first step is the following:
<pidl>?AAAAFAAfaIBTHIegQmkQouoIACswMJ0AAA==</pidl>
I've added it to the exploreroverride.oxc and I'm going to change the value of Explorer Replacement so that thing doesn't open again.
Very strange that something is trying to open that folder. As far as I can tell it doesn't exist in Windows 10 or 11.
(That in turn makes it hard to test code that tries to detect the problem, as asking Windows to open the folder results in errors, with the request failing before Opus gets involved here.)
Oooof.
That's going to be really hard to bug fix, huh. If you need my config files for anything, let me know. I can send you an email with them or something.
Thanks for the huge effort.
We'd probably need your whole PC (or at least all the software installed on it). 
Did adding the IDL path to the exclusions XML file stop the problem?
Unfortunately, it didn't. :\ It still showed up.
I rebooted my work PC especially to test it... (I hadn't closed it since my workplace now has AC)
EDIT:
List of installed software:
Acrobat DC
Adobe Audition 1.5
Adobe Audition 2025 + Bitter
Adobe Creative Cloud
Adobe Genuine Service
Adobe Media Encoder 2025
Adobe Premiere Pro 2025 + Voukoder 13.4.1
Blackmagic RAW
Cintel Scanner Software
DaVinci Resolve
DaVinci Resolve Contro Planels
Directory Opus
Discord
EAC
Fairlight Audio Accelerator Utility
FFmpeg
Firefox
Foobar2000
Google Chrome
Handbrake
HEVC Video Extension
Host OpenAL
Huffyuv AVI lossless video codec
Hybrid
Iobit Unlocker
Microsoft Edge
Microsoft Excel
Microsoft Teams
Microsoft Visual C++ Redistribuables (lots)
Microsoft Word
Notepad++
OBS
PBCore Cataloging Tool
PotPlayer
ReNamer
RetroScanHD (very specific software for very specific hadrware)
RetroSyncAudio (very specific software for very specific hadrware)
TeamViewer
Thunderbird
Ut Video Codec Suite
dbPowerAmp Video Converter Extra codecs
VLC Media Player
WinDirStat
XnView MP
Drivers:
AMD Chipset Software
Gigabyte App Center
Epson Scan 2
GigabyteFirmwareUpdateUtility
Gigabyte GService
Intel Network Connections 25.0.0.0
Intel Wireless Bluetooth
Logi Bolt
Logitech Unifying
Logitech Options
Logitech Setpoint
SoundBlaster Audigy 5 Rx
ATI Capture Card driver
More useful to work out what's running on startup, since it'll be one of those.
Autoruns can help here.
We've made a change for the next beta so it reports the process name as part of the information (next to "DM_NEWLISTERIDLSTR" or similar) for this type of action.
That should let you track down what's opening the Internet folder after reboot more easily.
That's great. The moment the next stable version drops, I'll let you know what it shows here.
It's probably Power Toys Command Palette that's triggering the problem.
We've made a change for the next beta which will resolve the issue.
Until then, a quick way to avoid the problem is to go to Preferences / Launching Opus / Explorer Replacement and then select:
instead of Replace Explorer for all folders or similar.
