It installs a program and states that certain viruses are infecting a victims computer that actually aren’t. Eventually causes the system to freeze and crash and cancels out any antivirus software that maybe on the persons PC. It also pesters you into paying up to $50 for them to stop bombarding you with error messages. The software it just fucks up the system if the person purchases it.
A Brand of “scareware” that just appears on a victims computer often with the victim doing nothing to provoke it.
With criminals injecting Malware Defense into victims computers, protective software isn’t safe anymore.