Interesting find in Norton Performance information. Might be start and cause of my issues since bringing 360 aboard.
On 2.13.14 I downloaded the latest edition of my NIS 2012. (NIS Downloader.exe)
On 2.17.14 I had to renew and at that time I did the upgrade to 360 Premier Edition. The info shows N360Downloader.exe. ONLY
On 3.03.14 I had 3 AutoDetectPkg.exe downloads....the same day and last day I had version 21.1.0.18 loaded and when I had a series of scan failures and at least one large Live Update of 180+mb.
On 3.04.14 I did the manual update from 21.1.0.18 to 21.1.1.7. Two downloads that day: AutoDetectPkg.exe and N360Downloader.exe. But I also had: Number of Installations:1 Norton Applications-Norton 360 Premier Edition. I did not have this install on 2.17.14 when I upgraded to 360.
Still nothing strange going on today, no scan issues, no large updates etc. So that makes just one scan issue and one large update since moving to 21.1.1.7 on 3.04.17
Windows 7 64-bit Sp1 Also using CCleaner and free Malwarebytes