Fix Windows Firewall Error 0X8007042C

Also, in a few cases, having third-party firewall software can disable Windows Firewall. Uninstalling it should fix the problem instantly. This article will provide a few fixes, which include scanning for and removing malware, and starting the Windows Firewall and its dependencies. This error applies to Windows versions from Vista through 10.

Method 1: Starting Windows Firewall Service and its Dependencies

You can start the Windows Firewall services and make sure that they start automatically in the future. Follow these steps to do this:

Method 2: Starting Associated Services

It could be possible that services associated with Windows Firewall are not ready. You can run the following commands in an elevated command prompt or using the steps described below. Copy the following commands and paste them in the Notepad window. sc config MpsSvc start= auto sc config KeyIso start= auto sc config BFE start= auto sc config FwcAgent start= auto net stop MpsSvc net start MpsSvc net stop KeyIso net start KeyIso net start Wlansvc net start dot3svc net start EapHostnet net stop BFE net start BFE net start PolicyAgent net start MpsSvc net start IKEEXT net start DcaSvcnet net stop FwcAgent net start FwcAgent

You can also try running this script I made for an extensive repair. Right-click on the file and Run as Administrator. Follow the prompts in the command prompt window to get your firewall fixed.

Method 3: Scanning for Malware

The presence of malware can prevent your Windows Firewall from starting, as it can block the malware’s communication with the home server. Use your existing malware software to scan for and remove the malware, or follow these steps to install and use anti-malware software.