Adware:Adware (or spyware) is a small program that is designed to show advertisements (in various form and degrees of intrusiveness) on your computer. It often reports personal information back to its owners. As a result your sense of privacy can be violated.
iVideoCodec is a variant of the Zlob Trojan malware. iVideoCodec masquerades as a video codec. iVideoCodec program is malicious and extremely dangerous. The iVideoCodec Trojan installs itself secretly through deceptive mechanisms, such as browser security exploits, and opens up a backdoor security hole, allowing remote attackers to control your computer, execute programs, download additional malware, and steal personal data and credit card information. The iVideoCodec Trojan may also install rogue anti-spyware programs and deliver excessive numbers of pop-up advertisements.
Technical details (How to remove iVideoCodec(pop up))