Malwarebytes quarantined this on my system as a trojan. It is located here: C:\users\myname\aregistrylocation.tmp\WiseCustomCalla.dll I googled it. Confusing results; one saying it is a Microsoft file that is safe and another saying it is a McAfee file that is perfectly safe. On microsoft.answers this file is identified as safe. I do not have McAfee, so not from here. The system has not crashed as yet, nor have I received any popups from MS indicating a need for this file. Wonder what uses it? NB: Did see that WiseCustomCall.dll is indeed a trojan (note the Call vs Calla). MBAM quarantined xxx.Calla on my system. False positive, maybe.