Though I expected exactly this response to the late decision (should never
have been supplied on W2K), I understand the real reason they did it, which
would make more sense if they just stated it instead.
The reality is that Windows 2000 was never intended for sale outside of
corporate environments, with commercial firewalls and protection suites. It
also doesn't have the Win XP SP2 or Vista built-in OS protection, which is
what Defender was designed to work with. Though I'm writing this on a W2K PC
myself, I agree with this move completely, I just think they should have
announced it earlier.
Cutting off access to Defender now makes sense, since most individuals
should be using either Windows XP or Vista, which officially releases January
30th. I've gone back to Spybot S&D until I can buy a new PC with Windows
Vista installed myself, which was my plan all along.
Bitman