Skype for Business 2016 freezes on a computer that has Malwarebytes is installed


On a computer that has Malwarebytes Anti-Malware client software installed, Microsoft Skype for Business 2016 freezes when you try to start an A/V scenario, such as making an audio or video call or joining the Audio or Video portion of a meeting, file transfer, or Application or Desktop Sharing. Additionally, the following event is logged in the Application log:


To fix this problem, install the latest update for Skype for Business 2016.

Skype for Business 2016 Click-to-Run clients

Deferred Channel: 16.0.6741.2048 and later builds

First Release Deferred Channel,First Release Current Channel, CurrentChannel: 16.0.6965.2058 and later builds

For more information about C2R Channel builds, see Office 365 client update channel releases.


To recover the computer from this condition, try the following methods in the given order:

  • Exit Malwarebytes client. This may let Lync.exe (Skype for Business 2016) exit completely.
  • Restart the computer.

After the computer is recovered, add Lync.exe to the Web Exclusions list in Malwarebytes, as shown in the following screen shot.

screenshot of Malwarebytes settings

For more information about how to set Web Exclusions, go to the following Malwarebytes website:

Web Exclusions

More Information

To determine whether your Office installation is Click-to-Run or MSI-based, follow these steps:

  1. Start an Office 2016 application.
  2. On the **File **menu, select Account.
  3. For Office 2016 Click-to-Run installations, an **Update Options **item is displayed. For MSI-based installations, the **Update Options **item isn't displayed.
Office 2016 Click-to-Run installation MSI-based Office 2016
The screenshot for Word click to run The screenshot for Word MSI


Microsoft is researching this problem and will post more information in this article when the information becomes available.

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