Adware is another potential threat to your computer if you access the internet. Adware is free software that is installed onto your computer with your permission and can be in the form of software that is used to automatically fill in web forms. In exchange for carrying out this task the installed adware will track your internet activity and show you targeted advertisements. It should be noted that people who use adware have legally opted into this. This is usually done in the fine print of an end user license agreement that you must accept in order to download specific software applications.