How many years was it since Microsoft stopped supporting and releasing security patches for NT 4 Server ? Is there anywhere to get a list of security weaknesses in NT 4 Server that have been addressed in newer versions of windows server i.e. 2003/2008...

Mainstream support ended in 2005, but some companies took until 2006: http://www.microsoft.com/presspass/features/2004/dec04/12-03ntsupport.mspx I'd imagine that there isn't a complete list that was addressed by the upgrades, but you may be able to find what you are looking for here: http://www.microsoft.com/technet/security/current.aspx -- Mike Burr