CenturyLink Norton 360 attacks from Svchost.exe

Finally! found help...Hello, Ive had CenturyLink/ Norton 360 for about 2 months now using their @EASE package, and Ive already had a virus after opening a file called  Qoobox. Since then, around 2 weeks ago I got hit with fake FBI warning page wanting $400.00. I downloaded and used Norton Power eraser and then backed up my files and my Norton 360 is constantly under attack from Svchost.exe to the point an error shows up and I have to reinstall my complete security/antivirus programs which leave me open to more attacks, this has happen twice now. So I figured Id take the time and get some knowledge and use all my tools to their potential. Any help is appreciated.