Hector is trying to use Windows Defender to run an antivirus scan. Windows Defender refuses to run. When he opens the Action Center, Hector realizes that Windows Defender has been disabled and another antivirus software is running. Hector does not recognize the other antivirus software. What type attack has infected Hector's computer?

Rogue antivirus

Explanation:

A Rogue antivirus is a security software in which it misguides the users to pay for it so that the malware or virus could be removed from the computer but actually this is a malware which is installed in the computer system so that they could able to do fraud with the users

In the given situation, since Hector is trying for run Windows defender but it is disabled and on the other side the other antivirus software that infected the computer

Therefore this situation represents the rogue antivirus