The US Navy has reportedly paid millions of dollars to ensure the continued support of Windows XP, despite Microsoft's efforts to wean individuals and organisations off the retired software.
The Navy's Space and Naval Warfare Systems Command revealed in an advisory note earlier this year that it was after the extension.
An existing extension ran out on 8 June 2015, and the Navy sought more time to move away from its current systems.
"On 8 April 2014, Microsoft discontinued ongoing support for Microsoft XP, Microsoft Office 2003, and Microsoft Exchange 2003. Across the US Navy approximately 100,000 workstations currently use these applications," the Navy said in April.
"Support for this software can no longer be obtained under existing agreements with Microsoft because the software has reached the end of the maintenance period.
"The proposed additional effort will allow the US Navy time to migrate from its existing reliance on the expiring product versions to newer product versions approved for use in Ashore and Afloat networks, and will provide hotfixes to minimise risks while ensuring support and sustainability of deployed capabilities."
The US Navy released information last year about its move to Windows 7, explaining that it was "accelerating" the process and would consider disconnecting any onshore computers running XP from its wider network in April 2015.
The Navy indicated that this would take some effort, adding: "Cooperation and full disclosure with the contracted Microsoft eradication team is essential for this effort to be a success."
V3 has asked Microsoft to comment on or confirm the extension and is waiting for a response. The company has granted similar extensions to other parties including the Metropolitan Police and the UK government.
"The Microsoft Support Lifecycle policy for Windows XP was first announced in October 2002 so customers could plan for their IT investments and migrations," Microsoft said.
"Additionally, it was announced in September 2007 that support for Windows XP would be extended to 8 April 2014.
"Since support ended, we've continued to work with customers and partners to help the migration from Windows XP to a modern operating system."
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