*  You receive frequent popup advertisements
    * Your homepage taken over by an unfamiliar website
    * Your computer becomes increasingly sluggish
    * A new toolbar is  added to your Internet Explorer browser
    * Your browser is slow to open and / or requested pages are slow to load
    * Your searches are redirected to unfamiliar websites
    * Your system becomes unstable or you encounter frequent computer errors
    * Your computer connects itself to the internet or sends email messages without your permission
    * You see unknown or suspicious processes in the list of running tasks
    * Unknown software is installed on your computer without your permission
    * Unknown users connect to your computer remotely without your permission
    * You experience a surge in unsolicited emails arriving at your inbox