A good number of respondents believed that viruses are pieces of software that are intentionally annoying. Someone created the virus for the purpose of annoying computer users and causing mischief. Viruses sometimes have effects that are often much like extreme versions of annoying bugs: crashing your computer, deleting important files so your computer won't boot, etc. Often the effects of viruses are intentionally annoying such as displaying a skull and crossbones upon boot (Bob), displaying advertising popups (Floyd), or downloading lots of pornography (Dana).