The main cause is an unstable or weak internet connection, with other causes including firewall blocks, proxy issues, or antivirus blocking the connection.
Pre-Requisites:
Before moving to the full solutions, try the quick workarounds below. These helped many users. If the issue continues, proceed to the next section. If none of the above workarounds helped, continue with Solution 1 to configure Windows Firewall settings.
1. Configure Firewall Settings
As mentioned, Windows Firewall can sometimes block an app’s internet access if it thinks the app is unsafe. To make Zoom work again, allow it through the Windows Firewall. This solution helped many users.
2. Disable the Anti-virus Protection
Sometimes antivirus software blocks apps from running properly or from accessing the internet. Temporarily disabling it can let Zoom connect. Steps vary if you use a third‑party antivirus, but Windows includes built-in protection via Windows Security.
3. Configure DNS Server Settings
Connectivity issues with Zoom can also be caused by a corrupted DNS cache. Clearing the DNS cache resets stored entries so your device can fetch fresh information. We’ll also set reliable DNS servers, which often improves connectivity.
