How to fix a firewall or antivirus blocking Zoom meeting software

byFlorian published on

Is the firewall or antivirus software blocking the Zoom client on your PC? Well, don't worry. In this article, let's take a look at some Quick fixes for Zoom meeting connection errors caused by firewall and antivirus.

Firewall or zoom blocking antivirus? Here is the fix

Zoom cannot be connected Error 5003

The most common problem with Zoom is not connecting to a meeting despite an active internet connection. It can be boring, especially when you have a long work schedule.

If there is a problem, attempting to join a meeting usually throws an "Unable to connect" pop-up with an error code. Error codes 5000, 5003, 5004, 104101-104106, and 104110-104118 indicate connectivity issues with Zoom servers. You can see the list of all codes and their meanings here.

To troubleshoot connectivity issues, you can try doing two things: configure your firewall or check your antivirus software, by following the steps below.

Configure your firewall

First of all, you need to make sure that your firewall is not blocking Zoom from connecting to the internet. Windows, by default, uses Windows Firewall. However, if you are using third-party firewall software, check if it is blocking connection requests from Zoom.

To check if Windows Firewall is blocking zoom:

  1. Open the Start menu and search Windows security. Click on it.Fix a firewall or antivirus blocking the Zoom meeting software
  2. Now click on Firewall and network protection.
  3. Select Allow an app to pass through the firewall.Fix a firewall or antivirus blocking the Zoom meeting software
  4. Once the new window opens, press Modify the parameters.
  5. Then scroll to " Zoom video conferenceAnd see if the boxes next to it are checked.
  6. Otherwise, check both boxes.
  7. Click on Okay at the bottom to save the changes.

Now try running Zoom and joining a meeting to see if the issue has been resolved. If the boxes were not checked, it was the firewall that was blocking the connection for Zoom.

Check your antivirus

Sometimes antivirus software like AVG installed on your computer may not allow Zoom to connect to web services. This is another reason why you may get errors while trying to join a Zoom meeting.

You can check if the antivirus is causing problems by temporarily disabling it on your PC. The usual process is to click on the antivirus icon in the taskbar and turn off protection for 10 minutes. However, the steps may vary - you can search for the same on the respective antivirus software website.

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The above methods should fix Zoom connectivity issues on your PC if firewall or antivirus caused them. However, if the problem persists, try reinstalling your wireless drivers and possibly installing the latest version of Zoom. If you have any doubts or questions, please do not hesitate to contact us via the comments below.

Also read: How to prevent zoom from automatically switching to full screen mode

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