If you use the mcafee antivirus service but you are not able to use it when you need the most then its quite a thing to worry.Like just think of a situation where you prompt with a message that your computer is at risk but when you start the scanning process by your mcafee antivirus the scanning never starts.
In that case you have to follow certain steps to deal with this situation such as:-
here you first of all check for the update of the windows, in case its not updated then you have to simply try to update it.
Followed by installing all the major updates such as opting the updates for your OS option.
After that you have to just restart the computer by performing the manual update in the mcafee.
One more thing that you can do is to run the mcafee virtual technician which is basically an automated self- healing tool that will easily diagnose as well as fix many problems that are related to the internet security.
And the last thing to try is to heck for the party software that may be creating the trouble for the antivirus to work properly.
These are some of the easy method which you can follow in order to deal with the situation but just in case these things does not help you then you can simply choose to contact the techies from the mcafee antivirus customer service in order to know some more troubleshooting steps.