DOS memory broken by microsoft windows XP update updates EMS

DOS based application no longer running under XP?

You need to roll back a windows update.

see:

http://social.technet.microsoft.com/Forums/en/itproxpsp/thread/e23d7e3d-3b43-458a-8757-925908e0a72c


and

Windows XP: Restore EMS (expanded memory) after 10 October 2012 Windows update

http://www.wpuniverse.com/vb/showthread.php?34748-Windows-XP-Restore-EMS-%28expanded-memory%29-after-10-October-2012-Windows-update&p=238767