Unknown account on Norton EXEs (properties>security tab)

I noticed there's a unknown account on all Norton exes, and only on norton applications. I mean the properties>Security tab, is that normal? I never looked into norton-based exes before so I'm not sure its a new thing or not. One thing I saw today, it was "Unknown Account S-*******" something like that and today "unknown account" tag is gone, just its name, few numbers and some "-" s, its have only read/read execute permissions, so I take it this is a norton thingy?  I have Windows 7 64bit, already scanned my PC with Malwarebytes and Norton Power Eraser, found nothing. Thanks in advance