After years of being discontinued Dr.Web has brought Cureit back to life. Another possible free option for a second opinion. https://free.drweb.com/
I can't remember is this the updatable Dr Web program? Or the one that has to redownloaded for every virus definition update?
Not sure, I haven't used it in years. May give it a spin later today. If memery serves me I believe it is downloaded each time with the latest sig's. Not positive. Edit : Yes, it must be redownloaded for the latest sig's.