Win 7 firewall can not be enabled solution

Problem:
1. Click on the firewall in Windows 7 Control Panel “ recommended configuration & rdquo; no response
2. Open “ Service & rdquo;, can not start windows firewall, and an error
3. Open the "Event Viewer" and select "Windows Log" to find the most recent error. The event ID is 7024 and the log content is "The Windows Firewall service refuses." access. Stop with a service specific error. ”
The steps are as follows:
1. Open the registry, find HKEY_LOCAL_MACHINESYSTEMCurrentControlSetServicesSharedAccess;
2. Right-click SharedAccess, select “Permissions>;
3.Click “Add”.
4. In the text box below the input object name to select “ enter “NT SERVICEmpssvc”, then click on the right side of the "Check Name", the content of the text box becomes "MpsSvc" ;
5. Click “OK”;
6. Set the permissions of “MpsSvc”, check “Total Control” for “Allow” and “Allow”. Click “&” ;OK”.
At this point, go back to the control panel and select Firewall. Click “Recommended Configuration”