Windows XP End o’ Life

All machines running Windows XP must be upgraded, retired, or replaced. On April 8, 2014, any remaining will be blocked from accessing the internal network.
Microsoft will end support for Windows XP completely on April 8, 2014. Reference: http://www.microsoft.com/en-us/windows/endofsupport.aspx
Windows XP machines in the GS domain are listed here: http://ecomputing.usgs.gov/status/AD/