I recently renewed my subscription and following the install the start up time was seriously slowed down. I was also seeing 2 or 3 Norton icons in my taskbar tray. After using Start Up manager to no avail I found this solution regarding the icons and after changing the default setting in Antivirus boot time protection from "off" to Normal the start up speed improved considerably.
This is more a comment than a question I guess, but why would the default setting be "off" when that affords the least amount of protection. I don't know if that changed between the 2013 & 2014 versions, but I'm guessing that most users leave the default settings alone.