I have noticed that Windows Defender for x86 and x64 systems has been made available for download on the Microsoft downloads web site. If you don't know what Windows Defender is well it is basically an anti-spy ware program. Windows Defender is no longer supported for Windows 2000 because the mainstream support for Windows 2000 will end this month (October 2006). Windows Server 2003 SP1 and Windows XP SP2 are supported Windows platforms.
Here are the download links:
Cross-posted from
The .NET Aficionado