Bitdefender update server not updating
At the least, you can get rid of the issue with the help of experts.
You can grab these details from Settings à Events à Updates.
Alternatively, you may have turned it off by accident or mistake.
So, it makes sense to check it once again, and re-enable Update if not enabled.
Extra Readings: At times, however, you may see an error namely ‘Bitdefender Update Encountered an Error’.
It means that the antivirus is not able to deal with the update process. In this article, we have a solution to fix the Bitdefender 2016 Update Encountered an Error issue.
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So, at least during the Update process, you have to disable the third-party firewall in use.