Current version slows down Opera incredibly

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Here the same problem with Avast Antivirus Pro 17.4.2294 and Vivaldi 1.9.818.44.
I use Vivaldi as my main browser and this is driving me crazy, the lag is so annoying...
I hope there will be a solution soon or I have to look for another virus software.

[Asyn]

I had to try this. I installed Google Chrome just to check Vlavv post and he is absolutely right Goole Chrome is not affected by the slowdown. Maybe it's a conspiracy...OH NO not another one...

Probably not, as Avast Safe Zone Browser is also affected.

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I just tried opening Iron and Opera and it seems that speeds are back to normal...

[Eddy]

In another thread someone from avast confirmed the problem and they are working on a fix.
Yes, again they need to fix something

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I just tried opening Iron and Opera and it seems that speeds are back to normal...

I can confirm this.
After new virus definition update everything is back to normal (for now).

[Eddy]

Yup, they released a micro-update.
Those micro-updates come with a new VPS.

Let's hope things are really fixed.

Strange thing was that I had 20170509-0 and checked for a update.
There was none.
About one hour later I checked again and there was 20170209-4

I wonder what happened to -1, -2 and -3

4 updates in 1 hour?
Sure it can be, bot is not likely.

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The same problem here as the O/P with Avast A/V (version 17.5.2302 (build 17.5.3559.0) and Opera browsers (Opera 46.0.2597.39 latest version on one pc, and 42.0.2393.517 on another pc).

The only difference from the O/P is, I'm using the following on my desktop pc:-
(1) AMD A8-5500 APU processor 64bit
(2) Windows 10 Home edition 64bit

I've tried all suggestions in this topic, although disabling the shields made no difference at all. In the end I uninstalled Avast A/V using "avastclear.exe" in safe mode. I then reinstalled Avast A/V, but no change, Opera is still painfully slow to open and use. For example it takes Opera at least four times longer to open than usual. Firefox, Edge, IE and Nitro browsers appear not to be affected.

This is not meant to be a criticism against Avast, more of a heads-up for the developers, as I'm sure there must be others like myself with this problem who are running Windows 10?

Thanks for taking the time to read.

[Eddy]

What happens if you use a old(er) Opera version ?
Let's say 4 version ago.

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What happens if you use a old(er) Opera version ?
Let's say 4 version ago.

That's exactly what I did try, you must have missed that It happens in Opera version 46 and 42 as below:-

The same problem here as the O/P with Avast A/V (version 17.5.2302 (build 17.5.3559.0) and Opera browsers (Opera 46.0.2597.39 latest version on one pc, and 42.0.2393.517 on another pc).

Thanks for your interest.