Spyware: Gathers data, such as account user names and passwords, and transmits them to third parties.

Adware: Displays advertisements and gathers data, such as user web surfing preferences, used for targeting advertisements at the user through a web browser.

Dialer: Changes computer Internet settings and can force a computer to dial pre-configured phone numbers through a modem. These are often pay-per-call or international numbers that can result in a significant expense for your organization.

Joke program: Causes abnormal computer behavior, such as closing and opening the CD-ROM tray and displaying numerous message boxes.

Hacking tool: Helps hackers enter computers.

Remote access tool: Helps hackers remotely access and control computers.

Password cracking application: Helps hackers decipher account user names and passwords.

Others: Other types of potentially malicious programs.