Does anyone know settings to enable the use of Chromecast? The only references I can find in this forum have conveniently been ignored. Currently the option I’ve found for using Chromecast is to disable Avast. Something I don’t want to do.
Any help will be appreciated
What exact version of avast ?
Any other security (related) software installed ?
Basically all you need to do is tell the firewall (if you have that) to allow Chromecast.
IS v10.4.2233
“all you need to do is tell the firewall” Tried to, but was unsuccessful, which prompted my post.
I was in the firewall, found it under network connection, can’t figure out a way to just “allow” Chromecast app. When I try to connect, I get an UNREPLIED error. I know it is avast blocking it because it connects fine with protections turned off. Where do I “tell the firewall” to allow it?
Easiest thing to do is looking at the firewall log file to see what is blocked and than allow the parts that Chromecast need.
Chromecast will not work with the standard Avast Internet Security Settings.
I’m using a windows 8 laptop with the latest Avast software.
You must make this change to create an exception for the chromecast device.
Accept and you are good to go! Try to set up your chromecast device and you should be all set.
But there is no desktop chromecast app - it just plugs into Google Chrome. I have Windows 10 and can no longer use Chromecast or share files on my network anymore due to Avast.
Will it work if you disable the Avast Firewall ???
https://www.avast.com/en-eu/faq.php?article=AVKB25
Alas, that makes no difference. Could be a setting in the modem?
Since it’s not the firewall, that would the next logical place to look. 
Make sure the port isn’t blocked.
Woudn’t know what to look for. I suspect this all started when I installed Windows10.
You could also try the following:
Go to your Chrome Extensions >
Find the Google Cast extension and select options.
You may find your problem and answer there.
If that doesn’t work:
Remove Google Cast > Restart Chrome > Install and set-up Google Cast.
I’m using AVAST on a Windows 10 laptop. I also have 3 Chromecast devices attached to TVs in various rooms (2 first gen and 1 second gen). A Windows Chromecast set-up utility is available (visit http://www.google.com/chromecast/setup/ and click the link at the page bottom).
Tab casting directly from the Chrome browser works (using the Google Cast extension). However, managing devices from “Options” doesn’t find any devices on my system. I suspect this may be related to AVAST settings.
Good luck,
David
The problem seams to be “AVAST SECURELINE.” Turning off the service seams to instantly fix my problems. I am guessing the vpn aspects trigger automatic Copyright blocking protocols.
Answering a question going back to 2015 doesn’t make much sense. 8)
Hopefully, this helps someone who is still looking for an answer as all the replies above do not come to a solution and a google search for remedies does the same.
If you are using Avast Business Security, you need to make sure your private network is considered “friendly” by Avast’s firewall.
Open up Avast
Settings
Click “Components” (located on left-hand menu)
Click “Customize” next to “Firewall” Component
Click “Network Profiles” (located on left-hand menu)
Check mark the Friends radial box next to your network name
Click OK
Finished
Hope that helps!
Under Network Profiles: there is no option for Friends radial box any longer.
This is for Program version: 17.3.2291 (build 17.3443.0)
Hi all, I recently purchased a large screen smart TV and found I could not get my laptop to cast to my Gen 1 Chromecast. I hunted all over the internet with the usual comment about rebooting everything and switching everything off and starting again. I gave up on that idea years ago as it never makes any difference to these types of problems. A few other “experts” maintained that a Chromecast does not work with a VPN running but my phone still connected perfectly even with Surfshark running on both devices. Finally somebody suggested it may be related to antivirus software so I took a look at the Avast forum and sure enough there was the answer. For those using Avast One go into explore and click on Firewall, this brings up untrusted items which in my case was Surfshark and my Sky network. Switching these to trusted resolved the problem and now my laptop finds all the castable devices. Hope this may help others in the same situation I was in.
Posting in a topic getting on for 9 years old when much has changed isn’t advisable.
At the time of writing Avast didn’t even have a VPN component (nor Avast One) and VPN wasn’t even mentioned in the topic.