I have used SuperAntiSpyware for many years and it has successfully kept me safe. It has an automatic shutoff switch option I can set which shuts down my computer after it's done its complete scan. I set the time for it which is when I normally stop using my computer. It has recently been bought by another company so it remains to be seen if SuperAntiSpyware will continue to be a 5-star antispyware platform in the coming years.