Please follow the below steps to restart security center ;
Check and delete if you have any other security software in add/remove programs or its file and folders in C:/program files and common files.
Click start – run – type services.msc, In the services local window, check whether all mcafee services are started and automatic , if not double click on the particular mcafee service and change the start up type to be automatic ,
Click recovery tab at the top and change all three failures to “restart the service”.
Close all the programs and restart the computer and then try to open security center.
Kindly report back if you have any issues on the same.