Microsoft leaving Windows 2000 users out in the cold
A number of new Microsoft programs, such as Office 2007 and the new Zune software won't install on Windows 2000 systems. While some programs are truly designed with newer operating systems in mind, it appears Microsoft has intentionally blocked some programs from running on older systems.
For example, Windows Defender won't install on Windows 2000 systems. But if you futz a bit with the installer program, it appears that Defender checks to see what version of Windows you're using. If you're not using XP or a newer operating system it won't install. But some users have reported that you can modify the installer, and Defender actually runs quite well on Windows 2000.
It shouldn't come as a surprise that Microsoft no longer supports Windows 2000. The company only provides 5 years of support for most consumer software. But it's a step further to intentionally cripple software compatibility, presumably to convince users to upgrade their operating system every five years -- even if they're not experiencing any problems with their existing OS.