Kernel, User, and GDI.
32-Bit
Kernel, User, GDI
shell, kernel
There are actually four major architectural components of Microsoft Windows. These are Windows kernel, core processes, system startup, and the graphical subsystem.
Windows NT
Windows NT
The three major components that make up Earth are the core (including the inner and outer core), the mantle, and the crust. The core is comprised of a solid inner core and a liquid outer core, the mantle is a semi-solid layer beneath the crust, and the crust is the solid outermost layer of the planet.
Things
the start menu. the taskbar. the hard drive.
There are many "components" of Windows 98, far more than seven. In addition to MS-DOS files needed to boot the system, you have WIN.COM, several core drivers, such as VMM.VXD, configuration files like WIN.INI, and dozens of kernel mode and user mode .dlls, like COMCTL32.DLL and GDI.DLL.
windows 3.1
Windows 9x