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Within the realms of IT, there is often the phrase ‘in support’, this means that the IT teams officially support it, and in some cases are able to obtain support from the original vendor or service provider.  There are of course those systems that have been out of official support, these are the ones that we tend to put on the ‘risk register’ that require a code upgrade or hardware refresh. Please note the dates are from the UK Microsoft lifecycle site, check your region and with your vendor/service provider or IT team to establish what is supported, as an example:

• Windows NT 3.51 – Mainstream support – September 2000 – Extended support – September 2002.
• Windows NT 4.0 – Mainstream support – December 2002 – Extended support – December 2004.
• Windows 2000 – Mainstream support – June 2005 – Extended Support – July 2010.
• Windows 2003 standard edition – Mainstream support – July 2010 – Extended support – July 2015.
• Windows XP – Mainstream support – April 2009 – April 2014 – Extended support
• IIS 5 – Mainstream support 06/2005  – Extended support – 07/2010.
• SQL 2000 – Mainstream support – April 2008 – Extended support April 2013.
• SQL 2005 – Mainstream support – April 2001 – Extended Support April 2011.
• Exchange 5.5 – Mainstream support – December 2003 – Extended Support January 2006.
• Exchange 2000 – Mainstream support – December 2005 – Extended Support January 2011.
• Exchange 2003 – Mainstream support – April 2009 – Extended Support April 2014.
• SMS 2.0 – Mainstream support – April 2004 – Extended Support April 2011.
• SMS 2003 – Mainstream support – January 2010 – Extended Support January 2015.

Do remember that what the vendor supports and what you actually use can so easily differ, that Windows NT has been out of support does not use mean many enterprises are not still using it, whether through choice or because their application, their system is validated for that platform. I was speaking with a client the other day that had said virtualization had allowed him to run legacy systems a little longer whilst the code was updated, by having their systems run on a virtual machine as the new hardware wouldn’t run the older operating systems.

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