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Consumer Products => Avast Free Antivirus / Premium Security (legacy Pro Antivirus, Internet Security, Premier) => Topic started by: REDACTED on November 25, 2017, 09:04:04 AM

Title: Root cause of website slow-down when Avast is in ?
Post by: REDACTED on November 25, 2017, 09:04:04 AM

I have a very weird problem where I cannot identify root cause.

I bought Dell with pre-installed McAfee AV. I reset the operating system fully and first thing I do once the reset is completed, I uninstall McAfee. Next step I do is install Avast. Then I install Chrome and it becomes very slow - starts not bad but after few websites it takes ages to open in any browser - Chrome or Edge - all the same (circle keeps turning and turning and turning..).

We have another laptop (Asus) which works with the same Wi-Fi and also on Avast without any problems - same Windows 10.

So I say - problem must be with my WiFi hardware or software - I take laptop to shop, connect to their WiFi and.... everything is ok. Browser opens swiftly. What on Earth ?!

SAME ROUTER - SAME AVAST - SAME OPERATING SYSTEM - ASUS - all ok
SAME ROUTER - SAME AVAST - SAME OPERATING SYSTEM - DELL - slow
SAME LAPTOP - SAME SETTINGS - DIFFERENT WIFI - all ok

I am 100% sure problem is with Avast because if I leave McAfee or remove and install Kaspersky then there is no huge slowdown. But this problem weirdly affects only my Wifi, not the one in shop. I will start taking this laptop to friends when visiting and see what happens but maybe anyone already suspects the root cause ? Any other preinstalled software which Dells have in-built and which is causing Avast to slow websites ? But why only at my home Wifi ?

Title: Re: Root cause of website slow-down when Avast is in ?
Post by: Asyn on November 25, 2017, 09:07:46 AM

- 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..?

Title: Re: Root cause of website slow-down when Avast is in ?
Post by: REDACTED on November 25, 2017, 09:26:20 AM

Avast Free, latest version downloaded yesterday directly from Avast website

Operating system Windows 10 Home
Processor intel i3 - 7100
Memory 8 GB
System 64 bit
Build 15063
Version 6.3
Edition Core

Laptop is clean after reset but it had McAfee preinstalled, which I removed as first thing after reinstall.

Title: Re: Root cause of website slow-down when Avast is in ?
Post by: Asyn on November 25, 2017, 09:27:53 AM

There was a bug regarding Dell, you could try the latest beta: https://forum.avast.com/index.php?board=15

Title: Re: Root cause of website slow-down when Avast is in ?
Post by: bob3160 on November 26, 2017, 04:21:35 PM

@pawelstolars,
How did you remove McAfee ???
If you didn't use their removal tool, follow these instructions:
How to Successfully Install Avast: http://goo.gl/VLXde