After installing the Avast software I rebooted my computer and after reboot a popup window appeard asking me to register my Avast software.
At this time my router was still working, I started the registration process but when it was time to hit the REGISTER button I got an error message in my webbrowser.
After this all my internet depending applications went offline, I thought this could be cured by another reboot and so I did.
After the 2nd reboot the local area connection symbol in the down right corner showed an ! mark, and I started to look for the problem, I checked my internet access details such as IP, gateway and such and everything checkout fine.
After 20min of searching for the problem I gave up and de-installed Avast, and after another reboot the problem remained.
At this time I went to check my internet access from my other computer and it was also down, wich led me to suspect a router issue.
I tried to re-activate the router but this failed, and there was nother left but hard reset the router and spend 30min with reconfigure all settings.
I’ve got exactly the same problem today.
I did installed last version of Avast Home, did a virus check after reboot (everything was fine) then when Windows starts again: no more connection to network.
I tried to release/renew IP and the computer wasn’t able to get IP adress from DCHP.
I did stop every avast protection without success on getting connection. I tried manual IP configuration → no access to network, no ping reply from the router.
I did then uninstall avast and rebooted the computer → still no luck and no connection at all (DCHP or manual IP).
Then I’ve checked the other computers on my LAN (2 on ethernet and 1 on wifi), both ethernet plugged computers (OS: CentOS and Geexbox) were disconnected from network they did get the same symptoms (no ping to anything, no DCHP) while they only run on linux without any anti-virus.
But the wifi’s computer (OS: Ubuntu) was alone on network and the only one to get access to the LAN and the Internet without any problem.
Strange indeed. My router is a D-Link DGL 4300.
All stopped when Avast started for the first time on one of my computer (the only one with windows as OS). All ethernet computers were impacted but not the wifi.
So I saved the configuration of my router (it’s a nice option in this router) then reset it and everything runs fine again all computers have access to LAN and Internet now.
This is the kind of thing that I’ve never seen, so strange also to see on this forum that someone else got the same problem with Avast and a D-Link router.
As a former worker of software industry, I decided to reproduce the problem (I mean reinstall Avast on the windows PC and check what happen). But guess what? The problem did not reproduce… Avast is running and I don’t have any network problem for the moment.
avast is software running under the Windows operating system of your computer.
Your router is another computer - albeit network connected - to your Windows computer, but there are no routers that I know of running on Windows operating systems.
Just how does anyone imagine that avast reached out and managed to crash their router? Not just crash it but require a configuration re-installation.
Anyway, after saving my router settings I think I have gathered enough courage to try install Avast again, see U guyes on the on the other side…wish me luck!
Yes I know and no firewall was active, and the worst: any other computers (linux computers) wired to this router couldn’t connect to the LAN too (manually or with DCHP) and suffered from the same problem, seems like the whole ethernet function of the router was down and only wifi was still alive.
So I was guessing if Avast when installing or at first run didn’t send any kind of special packets to/through the network that D-link routers don’t like (that means the problem is on d-link side, because a router shouldn’t crash like this. We should report this to d-link support because just thinking that some packets could crash a router really scares me).
Anyway, as I said before: after resetting the router I re-installed Avast and they now both work fine and I’m pretty happy with Avast.
It’s just to inform d-link users who could face the same problem: just reset the router then install Avast again and you’ll be fine.
Yeah, we could also see the situation this way: we are now 2 D-link customers reporting the same technical problem… ;D
Glad you discover the solution… but, again, seems that is not related to avast. The router should have its settings changed by some other tweak, application, etc., at least, I can’t understand how…
Sorry but the latest versions and quite possibly the older versions CAN and DO interfere with routers !
If you had said they cant change setting I may have agreed but being on the end of avast stopping me from setting up my router tells me that you are wrong.
I was searching for relevant “ROUTER” issues and found a mistake. This was duly pointed out. The age is irrelevant. Anyone else searching for the same type of information I was may have been mislead into believing that AVAST does not cause router problems. Simple fact is that there are plenty of posts to suggest otherwise.
Avast! never touched anything from my router and i installed it in alot of computer and no problem at all so i dont not know why its happaned to you. But remember to never have more than 1 anti virus or firewall.
I have a DLink DI-524 & a DLink wireless card, they have never interfered with avast!.
A few years ago I got a virus warning from avast! recommending terminating connection. Nothing got on my computer, but avast! did detect I was on a network & recommended I shut off the other computer(s).
Avast! couldn’t tell anything about my network or interfere with it. I had only one other computer on my network & it was off! I don’t consider what I had as a “network”, just two computers hooked up to a DLink router for internet access.
I used to use a MyEssentials (by Belken) router & avast! didn’t mess with it.
Sorry for posting in an old thread, I just wanted to confirm that avast! doesn’t mess with routers.
Age is ALWAYS relevant to information. You would not “book a flight based on an old schedule !”
I pointed out a factual error in that while avast “does not change settings on a router” it can interfere.
If I found relevant information to help me in an old post it is more than probable I would thank the OP.
Therefore resurecting an older post.
Having read more posts on router issues it does seem quite feasable that “interference” was and is an issue with some routers. I am quite happy with avast overall but when I have to RDP around a network to be able to get at some of the settings on routers it does beg questions and answers.
I have no problem with NOD32 or AVG from the other machines and that certainly does not mean they are any less efficient in thier operation. As for the poster who suggests only one antivirus I would disagree. When done correctly more than one antivirus offers a great deal of security. No two antivirus are the same I have seen first hand virus get through one antivirus only to be nailed by secondary measures. just the simple fact that I can scan shared drives of other computers with a different antivirus has prooved itself many times over. “Never put all your eggs in the same basket”
I have tried to add both the IP and resultant web page to exclusions in avast but to no avail. I can however state that it does now let to a page on the router that I had problems with before but still locks me out of the “blocked sites” page.