Avast - Latency

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I have very big problems with latency, when I have Avast ON.
With speed test by Okla, in most cases there is latency error or latency is >300, 400.
My latency, when Avast is disabled is 9-10ms.
I have cca. 12-15 devices connected on my network and also 5 IP Cameras.
If there is any good suggestion what to do or else I'll have to change antivirus solution.
Like I saw on web I'm not the only one with that kind of problem.
By the way: Computer has 8700K Intel procesor and 16Gb Ram, so Hardware is not a problem.
Thank you.

[Asyn]

- Which Avast..? (Free/Pro/IS/Premier)
- Which version..?
- OS..? (32/64 Bit..? - which SP/Build..?)
- Other security related software installed..?
- Which AV(s) did you use before Avast..?

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- Free
- Latest version
- Windows 10, 64 bit, latest update
- no other security software except windows firewall
- no other.

[Asyn]

-> https://support.avast.com/article/Troubleshoot-Antivirus-Web-Shield

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I I understand correctly maybe the only solution is to disable web shield? Is then Avast still working his core function?

from https://support.avast.com/en-us/article/Troubleshoot-Antivirus-Web-Shield/ :
Some network components or connection types may be incompatible with a parts of Avast Antivirus or Web Shield in particular, as the default setting for some routers and ADSL modems may expect a different connection or packet type. This mismatch can cause connection resets and timeouts. Web Shield scans may also cause a device to time out if the device has a short timeout setting.

Avast monitors reports regarding specific devices and contacts device vendors about frequent issues with proposed coding solutions or workarounds. However, many issues are related to specific settings within Web Shield and can be disabled without eliminating your protection.

[bob3160]

I I understand correctly maybe the only solution is to disable web shield? Is then Avast still working his core function?

from https://support.avast.com/en-us/article/Troubleshoot-Antivirus-Web-Shield/ :
Some network components or connection types may be incompatible with a parts of Avast Antivirus or Web Shield in particular, as the default setting for some routers and ADSL modems may expect a different connection or packet type. This mismatch can cause connection resets and timeouts. Web Shield scans may also cause a device to time out if the device has a short timeout setting.

Avast monitors reports regarding specific devices and contacts device vendors about frequent issues with proposed coding solutions or workarounds. However, many issues are related to specific settings within Web Shield and can be disabled without eliminating your protection.[/color]

You need to read a little more than just the first part of that tutorial.
Do some of the settings changes suggested. You certainly don't want to disable the component.