Windows 7 firewall cannot be enabled

Problem:
1. Click "Recommended Configuration" in the Windows 7 control panel and the firewall does not respond.
2. When "service" is enabled, Windows Firewall cannot be started and an error is reported.
3. open "Event Viewer", select "Windows Log"-"system", and find the most recent error. The event ID is 7024, and the log Content is "Windows Firewall Service is denied access. The Service stops due to a specific service error ."

The procedure is as follows:
1. Open the registry and find HKEY_LOCAL_MACHINE \ SYSTEM \ CurrentControlSet \ Services \ sharedaccess;
2. Right-click sharedaccess and select "permission ";
3. Click "add ".
4. Enter "NT Service \ MPSSVC" in the text box below "Enter object name to select", and then click "Check name" on the right. The content in the text box becomes "MPSSVC ";
5. Click OK ";
6. Set the "MPSSVC" permission and select "Full Control" to "allow ";
7. Click OK ".

Return to the control panel and select the firewall. Click "Recommended Configuration.