Cause:
This is a known issue. The Webex app for Windows, and several other applications may crash if an older version of the Lavasoft Web Companion software is installed on the computer.

Solution:

To resolve this issue:

1. Uninstall the Lavasoft Web Companion software from your computer.
2. Confirm that the LavasoftTcpService64.dll file was deleted from the following location:

• For 32-bit Windows: C:\WINDOWS\system32\LavasoftTcpService64.dll
• For 64-bit Windows: C:\WINDOWS\SysWOW64\LavasoftTcpService.dll

3. Restart your computer, then launch the Webex app.

For more information on uninstalling the Lavasoft Web Companion software, see https://support.adaware.com/hc/en-us/community/topics.