Windows Firewall Troubleshooter is a troubleshooting tool from Microsoft that lets you automatically diagnose and fix problems with Windows Firewall.The program can automatically fix problems like: Windows Firewall is not the default firewall, firewall not starting, Remote Assistance not working, file and printer sharing is blocked, BFE service is missing, as well a firewall start problems related to error codes (Error Code 80070424) or (Service-specific error 5 (0x5)).Windows Firewall Troubleshooter comes as a .diagcab file, there is no installation, you just need to double-click the file to run the troubleshooter.