Who invented the first antivirus software and when was it written?

The answer to this question can be given as:

The first antivirus was written in 1987 by the German security expert Bernd and the name of the antivirus is Vienna Virus.  

Explanation:  

Antivirus: It is a software or anti-malware software that is used for providing security. It is a tool that runs on various digital devices and searches for files that should not be on your computer. If the file is found then It defends the computer from incoming threats and seeks-out, stops and alerts of viable threats from the system so the computer works properly. So, the first antivirus was developed in 1987 by German security expert Bernd.