Slow Internet with AVG Internet Security

I'm posting this second time because my previous thread is no longer available online: 
https://support.avg.com/answers?id=9065p000000kMXt

Original question:
Hello
I have 1Gbit FTTH in my home.
Without AVG Internet Security my speed is approx. 930Mbit/s (speedtest.net)

With AVG installed my speed is approx. 630Mbit/s

Manual disabling AVG protection does not change anything. I tried to disable any single component of AVG.

Only way to achive full 930Mbit back is uninstalling AVG.

The only diferance in config between 930Mbit and 630Mbit is AVG.

Is it normal that Im loosing 30% of speed with AVG?

Im not using VPN during tests.

Im open for any suggestions. 

Hello Tomasz,
Thank you for contacting AVG Community Support.
We apologize for the trouble caused. We'll check and help you.
This is not the expected behaviour with AVG Internet Security.
From when are you facing the issue?
Do you have any other security programs installed on your computer?
Awaiting your response.

Thank you for providing the screenshots and the information, Tomasz.
In this case, please disable AVG Internet Security using the below steps then check the issue.

  • Right-click the AVG icon in the notification area of your Windows taskbar, then in the menu that appears, click the green slider next to Protection is ON.
  • Click OK, stop to confirm that you want to disable all AVG protection.
  • The slider turns red (OFF), and all AVG components are disabled. AVG protection will re-enable automatically the next time you reboot your PC.
Thank you and keep us updated.

Thank you for writing us back, Tomasz. 
We apologize for the inconvenience caused to you.
We certainly check and help you with the issue caused
We have sent an email to your email address offering additional help please check the email and revert us back for further help.

Hello Tomasz,
Thank you for contacting AVG Community Support.
We apologize for the trouble caused. We'll check and help you.
This is not the expected behaviour with AVG Internet Security.
From when are you facing the issue?
Do you have any other security programs installed on your computer?
Awaiting your response.