Description: Is registered as W32/Sdbot-ADD worm. This virus is distributed via the Internet through e-mail and comes in the form of an e-mail message, in the hopes that you open its hostile attachment. The worm has its own SMTP engine which means it gathers E-mails from your local computer and re-distributes itself. In worst cases this worm can allow attackers to access your computer, stealing passwords and personal data.
Recommendation: Definitely not required - typically viruses, spyware, adware and "resource hogs"