Everyone, including purveyors of fake anti-malware products are entitled to their own opinion. Now that you've expressed one, it's more than time for a reality-check:
WinAntiVirus 2006:
aggressive advertising (1, 2, 3, 4); false positives work as goad to purchase; inappropriate collection of Personally Identifiable Information; same company as WinAntiSpy 2005, WinAntiSpyware 2006, & WinFixer [A: 5-21-05 / U: 6-13-06]
http://www.spywarewarrior.com/rogue_anti-spyware.htm
...a cross-section of WinAntiVirusPro 2007's "minor errors" as reported in the Windows Live OneCare forums:
http://forums.microsoft.com/WindowsOneCare/Search/Search.aspx?words=WinAntiVirusPro+2007&searchKey=&lcid=1033&searchscope=allforums&siteid=2&ForumID=-1&ForumGroupID=-1&localechoice=9&GoButton=+Go+