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Check Windows Firewall and security programs blocking internet

Sometimes a firewall rule stops traffic, this guide shows how to inspect and allow needed connections.

If one app cannot reach internet while others can, firewall may block it.

  1. Open Windows Security > Firewall & network protection.
  2. Click "Allow an app through firewall".
  3. Find the app and check Private/Public as needed.
  4. If missing, click "Change settings" > "Allow another app...".
  5. Test connectivity again.

For advanced users, open PowerShell as Admin and run:

  • Get-NetFirewallRule | Where-Object { $_.Enabled -eq 'True' }
  • inspect rules for the target profile.