Remove the Omega Redirect using the steps here. It should take care of the V9 as well.
How to remove Any Browser Redirect virus (Removal Guide)
http://malwaretips.com/blogs/remove-browser-redirect-virus/
Regarding a security program, I would suggest either Avast (free) or Microsoft Security Essentials.
Avast
[moderator note -- MSE not valid for Windows 8]
Microsoft Security Essentials
http://www.microsoft.com/security_essentials/default.aspx
Be sure to cleanup McAfee completely.
McAfee Consumer Products Removal Tool three-step fix