Security center is updating definitions for windows defender
By default, Windows Update does not download and install updates automatically on Windows Server 2016.
You can change this configuration by using one of the following methods: Sample submission allows Microsoft to collect samples of potentially malicious software.
Judging by the number of views from the first Microsoft forum thread regarding error 0x80070643, it’s no exaggeration to state that tens of thousands of users have encountered this annoying error code.
Windows Defender update (KB2267602) fails-error code 0x80070643. My Dell laptop has been doing nicely since I added W10.
Even if you already uninstalled your previous antivirus and you’ve been using Windows Defender for quite some time without any problems, the remnants of your previous antivirus may now be causing the 0x80070643 error.
Completely uninstall your old antivirus programs, restart your computer and Windows Defender should be able to install the latest updates.
While the functionality, configuration, and management is largely the same for Windows Defender AV either on Windows 10 or Windows Server 2016, there are a few key differences: By default, Windows Defender AV is installed and functional on Windows Server 2016.
The user interface is installed by default on some SKUs, but is not required.
See the Install or uninstall roles, role services, or features topic for information on using the wizard.Multiple AV products can cause problems when installed and actively running on the same machine.See the question "Should I run Microsoft security software at the same time as other security products?We do not collect files that contain personal data, like Microsoft Word documents and PDF files.
To help ensure security and performance, certain exclusions are automatically added based on the roles and features you install when using Windows Defender AV on Server 2016.In order to get updated antimalware definitions, you must have the Windows Update service running.