Yes, Windows 7 didn't even hit the market until Thursday. But that hasn't stopped a fog of myths from enveloping the newest version of the much loved--and much hated--PC operating system from Microsoft. [Slide Show: The Best of What's New in Windows 7.] The software giant hoped that wide exposure to Windows 7 would help smooth its entry. Microsoft let millions of consumers and professionals download test versions of the operating system. And by a wide margin, testers have found the new system to be the best yet from Microsoft. Version 7 is leaner, more useful, and prettier than past...