Windows Defender WS2016 - Error Code 0x800705b4

Question

I am having a problem with Windows Defender on Windows Server 2016 Datacenter not working. It is something with the Windows Defender service not wanting to start. Do someone know what this could be?

Answer 1

Hello,

One possible reason could be that there is conflicting security software installed on your PC. You can check for this by opening the 'Task Manager' and navigating to the 'Startup' tab. Look for any suspicious software that might be running. If you find anything suspicious, disable it from the 'Startup' tab and also terminate it from the 'Processes' tab.

If this doesn't resolve the issue, you can try three additional workarounds mentioned in the accepted answer of this thread: WINDOWS DEFENDER ERROR CODE: 0X800705b4 - Microsoft Community.

I hope this information helps.

Best regards,

Karlie Weng

Answer 2

I am not sure of what that could be, I will do some digging, but also another thing. I cannot install a specific update via Windows Update.

• Security Intelligence Update for Microsoft Defender Antivirus - KB2267602 (Version 1.421.348.0) - Current Channel (Broad).

The error code 0x80070643, when i try to install the update...

Answer 3

Hello,

Apologies, but I'm not specialized in upgrades. For this update issue, you may want to create a new thread under the following category: Product: Windows Server / Devices and Deployment / Setup Upgrades and Drivers. This will ensure that more dedicated engineers are assigned to help resolve your Windows Update issue.