there is no linux kernel in vista !
vista has a kernel and linux has a kernel and the only thing in common is they both spell kernel the same way !!
you do know what RC stands for? and you expect it wto work? and not be locked out and all functional?
anyone could download the RC
have you looked at what x windows is?
n computing, the X Window System (commonly X11 or X) is a networking and display protocol which provides windowing on bitmap displays. It provides the standard toolkit and protocol to build graphical user interfaces (GUIs) on Unix, Unix-like operating systems, and OpenVMS, and is supported by almost all other modern operating systems.
X provides the basic framework, or primitives, for building GUI environments: drawing and moving windows on the screen and interacting with a mouse and/or keyboard. X does not mandate the user interface – individual client programs handle this. As such, the visual styling of X-based environments varies greatly; different programs may present radically different interfaces.
X features network transparency: the machine where application programs (the client applications) run can differ from the user's local machine (the display server). X's usage of the terms "client" and "server" reverses what people often expect, in that "server" refers to the user's local display ("display server") rather than to a remote machine.
MS is offering support for novel and such but think you will find that they are using nothing like a Linux kernel
it is working gui things and linux is a lot more than that ;-D