That sounds very much to me as if you've at some time had Norton software installed?
If that's the case, then you need to run the Norton Removal Tool (even if you don't remember having anything norton installed)
Download the Norton Removal Tool from here https://www-secure.symantec.com/norton-support/jsp/help-solutions.jsp?lg=english&ct=united+states&docid=20080710133834EN&product=home&version=1&pvid=f-home
Close all other programs, then run the tool. When it's complete, reboot the machine whether it asks for it or not.
After the reboot, open an Elevated Command Prompt, and run the following command
NETSH WINSOCK RESET
You'll be advised to reboot - do so.
then post another MGADiag report.