Recent versions of the MATLAB mathematical analysis software package have been experiencing issues finding the correct license file. By setting an "environment variable", it is possible to override the settings file that comes with the installer, and direct the Matlab License Manager to the correct location. If you are running MATLAB under Windows and experiencing the problem described below, this set of instructions will show you how to set the correct environment variable to solve this problem.
Open the "System" control panel.
(You can do this by right-clicking on the Computer icon and selecting Properties.)
(Another way to do this is by selecting Control Panel from the Start menu, and selecting System from the list of control panels--the "View by:" in the upper right should say Small icons.)