Under the Hood, Windows 7 is Vistas's twin

At Microsoft's recent Professional Developers Conference (PDC) in Los Angeles, the air crackled with anticipation. On the heels of Vista, arguably the biggest disaster in Microsoft's history, Windows 7 was about to be revealed. A blast of fanfare, and Chief Software Architect Ray Ozzie took the stage to pull the wraps off the new desktop operating system--which would deliver better performance, an improved user experience, and some nifty media-sharing features. The crowd salivated at the chance to play with Microsoft's latest and greatest.

Note: For a look at some of PC World's Windows 7 coverage to date, see:

•"A Tour of Windows 7 Beta" (video)
•"Windows 7 First Look: A Big Fix for Vista"
•"OS X Snow Leopard vs. Windows 7"
•"Microsoft Redefines the OS: Azure and Windows 7 Explained"
•"Microsoft Plans a Stripped-Down Windows 7"
As Windows desktop blogger for InfoWorld (a sister publication of PC World), I was drooling, too. When I got my hands on the Windows 7 "pre-beta," distributed right there at the show, I immediately installed it and began running tests. For PC World, I did an analysis of the changes (or lack of them) that consumers might see. For a deeper dive into my Windows 7 tests, check out Windows 7 unmasked on the InfoWorld site. The more I dug into Windows 7, the more I became convinced that I was dealing with an OS that was a slightly tweaked, nearly baked revision of Windows Vista.

Bottom line: So far, Windows 7 looks, behaves, and performs almost exactly like Windows Vista. And it breaks all sorts of things that used to work just fine under Vista. In other words, Microsoft's follow-up to its most unpopular OS release since Windows Me threatens to deliver zero measurable performance benefits while introducing new and potentially crippling compatibility issues.

In fact, the kernel in each major new version of the Windows OS has spawned a different, typically higher number of threads. So when I examined Windows 7 and found a nearly identical thread count (97 to 100) for the System process, I knew right away that I was dealing with a minor point-type of release, as opposed to a major update or rewrite.