Does having two or more Internet Security/Antivirus software on the same computer create operating conflicts? I have Norton/Symantec 360 (paid subscription) and SystemMechanic softwares loaded on one of my computers. A computer repair technician said having two or more similar protection services creates conflicts with each other. Is this true? I was unaware that System Mechanics was an Internet Security & Antivirus software. I thought it was only a PC systems tuneup/troubleshooting and repair software. Any help with this is appreciated? I'm running WinVista 64bit system on a HP tower.