Aahh!
Now I now where my missing 38.400 Euros went to...
The actual anti virus programs do not only rely on often outdated virus signatures but scan the running processes for suspicious behaviour and alert the user if they find an unknown program that i.e. overwrites other files, starts the browser or tries to connect to the internet. Things viruses tend to do.
All those free anti virus programs are free because users like Pisces do their job and send in suspicious files to be checked by the programers. That's the way they find new viruses and it enables them to update the virus signatures to be downloaded by free users as by paying customers.
Be aware that some "free helpers" transfer your complete system status including content of RAM if you ask them for support.
(Btw - is it programms and programmers or program and programers?
Or even programs and programmers?)