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Problem
A firewall is preventing the computer or an application from accessing the network or internet.
Symptoms
Specific applications cannot connect to the internet.
Network access works in Safe Mode but not normally.
Security software shows blocked connection alerts.
Some websites or services are unreachable while others work fine.
Possible Causes
Overly restrictive firewall rules.
Third-party security software conflicting with network access.
Recently changed firewall settings.
Application not whitelisted in firewall settings.
Resolution
Step 1
Check Windows Firewall settings for blocked applications.
Step 2
Temporarily disable the firewall to test if it's the cause.
Step 3
Add the affected application as an exception in firewall settings.
Step 4
Check third-party antivirus/firewall software for separate blocking rules.
Step 5
Restart the computer after making firewall changes.
Step 6
Re-enable the firewall once the issue is resolved to maintain security.
Prevention
Review firewall rules periodically.
Only disable firewalls temporarily for testing, never permanently.
Keep security software updated.
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