David Rak

Hi, I have a batch virus, I trying to open it on Virtual Machine, It destroyed my whole computer on Virtual Machine but my real computer was safe, When I scanned the batch file, ESET Antivirus was saying it it's safe, I was sended file for analysis but I don't get any reply from ESET about that, It was 2 months ago, I am rating ESET for five stars but this need be fixed, the batch file basically was killing explorer.exe process including deleting system32 and other files. Please reply why?