If you trust a file, file type, folder, or a process that Windows Security has detected as malicious, you can stop Windows Security from alerting you or blocking the program by adding the file to the exclusions list.

Allow an app through firewall - If the firewall is blocking an app you really need, you can add an exception for that app, or open a specific port. Learn more about that process (and why you might not want to) at Risks of allowing apps through Microsoft Defender Firewall.

Firewall & network protection in Windows Security. Find out the risks of allowing apps through Windows Defender Firewall and how to add or remove apps from the list of approved apps.

Automatically repair Windows Firewall problems, such as Windows fails to start Windows Firewall service (0x5) or Windows remote assistance is not working.

To fix this, follow these steps: Click the Start button, then type Windows Firewall in the Search box. Click Windows Firewall, and then click Allow a program or feature through Windows Firewall. Click the Change settings button.

Controlled folder access in Windows Security reviews the apps that can make changes to files in protected folders and blocks unauthorized or unsafe apps from accessing or changing files in those folders. Select Start > Settings > Update & Security > Windows Security > Virus & threat protection.

To turn Microsoft Defender Firewall on or off: Select Start , then open Settings . Under Privacy & security , select Windows Security > Firewall & network protection . Open Windows Security settings. Select a network profile: Domain network, Private network, or Public network.

Under Virus & threat protection settings select Manage settings. Under Exclusions select Add or remove exclusions. Select Add an exclusion. Choose one of the four options depending upon the type of exclusion you're trying to add: File - Excludes a specific file.

When you try to start Windows Firewall, you receive the following error if the Firewall service is disabled or if your computer is infected with malware: 0x8007042c.

For Windows clients and servers that do not host SMB shares, you can block all inbound SMB traffic by using the Windows Defender Firewall to prevent remote connections from malicious or compromised devices.