Windows 10: Barco ClickShare breaks start menu, OneDrive, Outlook and Store apps

Windows[German]Today another finding from the internet about Windows 10 (11) troubleshooting, where the error was caused by an app. Suddenly the Windows Start menu stopped working, OneDrive reported an error, and Outlook was also causing problems. At the end of the day Rudy Ooms found the culprit, it was the app ClickShare from Barco. I found it quite interesting how Ooms investigated and documented the whole thing and am posting the short version here on the blog for your information.


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The Error description

Rudy Ooms is an MVP from the Netherlands who probably works as an IT service provider for various customers. I had already picked up on a problem described by Rudy Ooms here on the blog in the article Still wipe issues when resetting Windows 10 (20H2 – 21H2) and Windows 11. The days I stumbled across the following tweet from Ooms, in which he addresses another Windows 10 issue.

Windows 10: Store App issues with ClickShare

He describes that he encountered an issue where Store Apps fail on Windows (10) with errors like 0xC000027B etc. The issue occurred with customers and he outlines the following error pattern:

  • Outlook fails to connect
  • OneDrive stops syncing because it can no longer connect (0x8004de44), or hangs on login
  • Windows 10/11 start menu no longer responds to left click (right click still works)

There were Windows updates (e.g. May 2022) which caused some problems. But Ooms writes that he noticed the problems with broken Store apps outlined above as early as February 15, 2022.

Analyzing the issue

In his blog post The Adventures Of the Broken Store Apps Across The 8th S-1-15-2-1, Rudy Ooms analyzes how he got to the root of the problem, how he fixed it, and what caused it. To analyze what was going on, Ooms inspected the Event Viewer entries for error messages related to the problems. In the Event Viewer, he then found an entry of the type:


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Repair for operation LocalSettings against package Microsoft.AAD.BrokerPlugin_cw5n1h2txyewy with error -2147024891 returned Error Code:  –2147024891.

where the repair of a package was attempted, but failed. Upon further analysis, which he documented in the blog post, he writes that the error code 2147024891 | 8007005 stands for an Access Denied error. Something corrupted the access rights for the Store apps and thus also for OneDrive and Outlook as well as the Start menu.

At first, to repair the approach, we tried to delete the broken user profile in the registry. After that, OneDrive and Outlook could be logged in again and successfully. But there was still the question what caused this effect. An analysis revealed that a read permission was missing for all affected Store apps and Explorer shell components. In the blog post, he presents scripts that he used to fix the permissions.

Root cause: Barco ClickShare

But more interesting is the cause of these broken permission entries. After comparing various Windows systems that were affected with unaffected systems, one cause crystallized. Barco's ClickShare app had been installed on all of the affected machines. 

ClickShare is a solution from Barco that automatically connects a notebook to room cameras, speakers and soundbars wirelessly. With just one click, users can wirelessly share a screen or start a video conference. The solution is likely to be in use in some companies.

According to Rudy Ooms, Barco has also admitted that their app is causing these problems and fixed the whole thing with the latest update. So, those who are experiencing such issues should make sure that their ClickShare app is up to date. For those affected by this issue, check out the post The Adventures Of the Broken Store Apps Across The 8th S-1-15-2-1 for more details on how to fix it. On Twitter, someone else has come forward with similar issues with the Palo Alto Cortex solution.


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4 Responses to Windows 10: Barco ClickShare breaks start menu, OneDrive, Outlook and Store apps

  1. Yannic laleeuwe says:

    Message from the ClickShare team:

    As quality and security are always top of mind for ClickShare, we are aware of the reports on an unresponsive Windows taskbar for end-users. Our team has been working hard to analyze these. Up-to-now there is no evidence that the issue is related to the ClickShare App. Of course, we keep on investigating and monitoring.

    To help users of the ClickShare App get back to work asap, we recommend to uninstall the ClickShare App, run the Microsoft updates, reboot the laptop and re-install the latest update of the ClickShare App.

    • Not amused says:

      We reported "a start menu issue case" case 3 months ago to Microsoft. After spitting through logs and being escalated to 4 different teams within Microsoft we got evidence that this occured after updating Clickshare. They have multiple other cases/customers who reported identical the same issue and after investigating ALL related to clickshare. Today we had 1 user who got the issue => checked at the installed applications -> Clickshare was updated TODAY and start menu issue….so i think there is evidence enough, the reason why you can't find it is related to the fact why you were not able to prevent it from happening in the first place…

  2. Yannic laleeuwe says:

    Updated message from the ClickShare team:

    More investigation has shown that the windows taskbar issue occurs when the User Shell Registry has been modified for some reason (e.g. windows update, change password, any Apps using Microsoft Outlook API or other).

    We have analyzed possible relations with the ClickShare App more in-depth and we can confirm that ClickShare does not modify Windows Registry values or permissions from the App. The ClickShare App only reads Microsoft Outlook Calendar via the Microsoft Outlook API for the One Click Join feature.

    The problem with the unresponsive Windows taskbar, therefore, is not a ClickShare App issue. It is related to Microsoft and it can be triggered by any application using the Microsoft Outlook API.
    We have shared the concerns with Microsoft with reference 32055363, if you encounter issues we advise you to flag this to Microsoft directly.

  3. skz says:

    I've managed to restore Start,Search, Outlook (and other office apps), but still have an issue with right side of taskbar. Notification center, Network, sound, battery, clock buttons doesn't work when left-clicked. Tried to re-create profile, but the issue seem to persist, even thought, when logged onto my local user to the same PC everything seems to work okay.

    I've recreated the profile by renamaing folder in \Users and by renaming registry in ProfileList, maybe it requires something more.

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