Today, my student inadvertently plugged in an infected thumb drive into my system and messed it up despite the fact that I have NAV. My NAV instead of protecting my system, allowed the virus in and rather started indicating that I should uninstall the Webroot Secure Anywhere. Less than three weeks ago when I renewed my subscription the NAV became incompatible with the Webroot Secure Anywhere but after three days, it started working again. I have tried scanning my system with Norton Power Eraser but it did not help. I wonder if anybody has an advice on what to do in this situation? Is there any other AV that can help me? Thank you in advance.