Answer: adware

AnswerCrossword Clue
ADWARENorton AntiVirus target
adwaresoftware with embedded advertisements
adwarecomputer software that is provided usually for free but contains advertisements
ADWAREProgram with plugs
ADWAREIt can dirty your Windows
ADWARESource of some pop-ups
ADWAREPop-up generator
ADWAREPrograms with popups, perhaps
ADWAREHard-drive infestation
ADWAREProgram with popups, perhaps
ADWAREInvasive software, perhaps
ADWAREProgram producing online pop-ups
ADWARERelative of spam
ADWAREProgramming behind computer pop-ups
ADWAREPop-up-producing program
ADWAREProducer of Web pop-ups
ADWAREInvasive apps
ADWAREPop-up producer
ADWAREOnline pop-up source
ADWAREProgram producing pop-ups
ADWAREProgram that generates online pop-ups
ADWAREProducer of pop-ups
ADWAREPop-up generators