A program or a fake system notification warning the user of a possible virus infection and urging him to buy a removal software.

Please let BitDefender disinfect your files.

Daniel RADU - Virus Researcher

Rogue antiviruses are software products which once installed will generate alerts of fake infections and urge the user to fix those issues. The user is informed that in order to clean his computer of the threats, he needs to buy a license of that specific AV. In reality the product even after being licensed/registered will  not delete any file or otherwise fix any of the detected issues.

Rogue AV's can usually be detected by the fact that they 'advertise' features like:

* instant scan of the computer

* 100% detection and removal of known and unknown threats