Thanks RejZor:

Blood.418
It is a not memory resident not dangerous virus. The .COM-files of current directory gets infection when the virus starts. The virus from time to time types: “File infected by BLOOD VIRUS version 1.20”.

But in my case I have a ‘memory block’ infected… I cannot map which file is related (infected) by it… Besides this, there is what SpeedyPC said :cry: