Environment
- Carbon Black Cloud Sensor: All
- Windows Server 2019
Symptoms
- System tray icon no longer appearing on endpoint (or shows the sensor as being in bypass mode)
- Check-ins no longer occurring
- CB Defense service may also show as stopped
Cause
A known issue (DSEN-10334) in ctinet where driver is not unloading during upgrade process
Resolution
- This issue has been resolved and should no longer be present when upgrading from 3.5.0.1813 or later, as mentioned in the release notes
- If upgrading from a sensor older thank 3.5.0.1813, the following workaround is available
- Move endpoint into bypass
- Reboot
- Perform upgrade
- Remove endpoint from bypass
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