AVG identified trojan SHeur.ETG today. I can't find anything about the trojan with this particular extension anywhere. Other SHeur trojans similarly detected during a Google updater download have been called "false positive." AVG also finds change to Host but then listed it as "changed." I do not understand this. This hard drive was reformatted just last week, and these messages appear as I was just resuming business as usual. Thanks you for your advice!!