I downloaded and took a look at each of these. In Dr.Web CureIt I noticed a setting for registry saving. I understand it creates a log file in a directory, but where are the setting changes being saved, in registry or a ini file? In Ewido Micro there are no settings but it's downloading the virus database (where?). Is it making any registry changes? I don't consider an app to be portable/standalone if it makes changes to the underlying base system. I don't know how to tell if a program does either (without asking). Thank you for the help.