the engine that runs Windows NT, 2K and XP is different than the engine that runs Windows 95, 98 and ME. is the engine that runs Windows Vista a new one, or the same one that runs Windows XP?

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XP OPERATING SYSTEM

Do you refer to the 32-bit version or the 64-bit version?
Mac

WINDOWS SUPPORT  RAM

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It doesn't seem to different from XP. It has a differenet look, but so far the navigating around is about the same. I have even used some of the same XP tweaks to disable things like Balloon tips. Things in Services are about the same. It is a 4.4 Gig install though so it is not for small Hard Drives. Also Driver support is a problem, as you would expect for a Beta edition. My sound card works like crap, and can't seem to find a better driver for it, but who needs sound anyway. Firefox Browser works great, thought Microsoft might try to make it difficult for another Browser. Firefox was the first thing I downloaded when I hit the Internet.:) Doubt I will ever trust IE again.

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The same engine (ported to 32bit/Win32 and 64bit/Win64, including WDM). Windows died after Windows version 4.90 "Millenium Edition". Windows NT is now in version 5.2 "Windows 2003". (XP is 5.1, 2000 is 5.0.) I think WinVista is Windows NT 6.0. The stupid kernel (VMM) of Win9x/ME may not be able to support all of these graphical features of WinVista.

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Windows NT Kernel has evolved. NT 3.1, 3.5, 3.51, 4.0, 5.0 "2000", 5.1 "XP"/".NET", 5.2 "2003" and 5.3 or 6.0 "Vista". Since 5.1, it is avaiable for 32 bit and 64 bit platforms. (WinNT3.1 introduced the Win32 programming model; Win95 was developed as an adaptation of Win32 for Windows; the 16bit app compat layer is called WOW "Windows On Win32") Win2k/XP/2k3 are 100% 32 and/or 64 bit. Windows 9x/ME are 64% 16 bit, 36% 32 bit.

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The main engine that encompasses Windows Vista is based on the same kernel and programming models as the one used in Windows XP, except now, most of the traditional programming function is exposed through the .NET Framework, and the API set is now called "WinFX" and not "Win32".
Also, there's Avalon, Indigo etc included, and WinFS to be ported in the near future.

With all of these new introductions into the core Windows base, its safe to say, Windows Vista is more like a hybrid-type version that makes it completely new.

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Also, should mention, that work on then-Longhorn was actually based on the Windows XP SP1 code base, but it was restarted to be based on Windows Server 2003 SP1 after it came out, as MS found it too hard to breakdown and componetise the code base to begin Windows Vista anew. Most of it still has Windows XP SP2 code in it as well though.

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