I have been picking one up every morning and my Norton has been catching it.
I thought it was probably from the Marlboro site where I enter contests so I didn't go there this morning so I could see.
I am changing my morning routine until I find the site where I am getting it.
Date & Time,Risk,Activity,Status,Recommended Action,Path - Filename
2/7/2017 7:39:09 AM,High,sevenzipsharp.ni.dll (Trojan.Gen. detected by Virus scanner,Quarantined,Resolved - No Action Required,c:\windows\assembly\nativeimages_v4.0.30319_32\sevenzipsharp\13059bf955c2236ef1c9d4cda358c0e9\sevenzipsharp.ni.dll