Solution for slow start of Windows Server 2016?

[German]Some administrators are complaining about the slow restart of Windows Server 2016 during update installations. A blog reader contacted me about this and I'm bringing up the topic again in a post.


Complains about slow Windows Server 2016 restart

Friday I received an email from German blog reader Volker L. in which he addressed the issue of slow restart of Windows Server 2016 during update installations. Volker wrote:

Win Server 2016, misery slow restarts after updates

Hello, Mr. Born,
I've often looked at your site to see what you have to offer against the miserably slow restarts of Win Server 2016 after update installation. Unfortunately we have been struggling with this miserable issue for months without finding a solution (maybe we just missed it…).

This week I had to deal with it once again. Some of the restarts lasted until 3 hours!

Out of this situation I found the solution for us and it is incredibly banal: We disabled Defender real-time protection and the machines are ready in 15…20 minutes. Maybe we tried this before without success, I don?t know anymore…

I wanted to let you know, maybe the info will be helpful for someone else if they find it on your (VERY HELP!!!) page.

At this point my thanks for the mail, the content of which I will post unabridged here in the blog.

There was something with Windows Server 2019

I kept the mail to be processed later, but a few hours later suddenly the thought 'Wait, there was something …' came up in my mind. This morning I searched my blog an immediately found the blog post Windows Server 2019: Defender Performance Issues, German blog reader Alexander F.  had drawn my attention to a similar problem with Windows Server 2019. He had massive performance issues on server installations of his customers. He identified the Windows Defender as a root cause. He proposed to remove Windows Defender in an administrative command prompt window using the following PowerShell statement (won't work on Windows 10 clients):

Remove-WindowsFeature -Name "windows-defender"

The server must then be rebooted. Then the performance problems caused by Defender should be gone.


Attention: It is not that simple!

If you disable Defender, the server is without virus protection. If this is the ultimat ratio, it's recommend that you use an antivirus protection from an alternative provider. But this is where the problem starts: Which product do you use? And I guess, it won't fix the root cause for the performance issues.

But before someone starts searching like mad for other virus scanners, wait until tomorrow's Sunday. I have prepared an article, that deals with the questions, why we have stability and performance issues and what you can do before deactivating Defender.

Similar articles:
Windows Server 2019: Defender Performance Issues
Solution for slow start of Windows Server 2016?
Windows virus scanner: performance & stability issues

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