Python Package installation causing [Error 13] Permission Denied on Windows 7

[Laura Creighton]

Over in the physics lab we have a big sign, which (translated) says:
'For windows 7, it is not enough to _be_ an admininstrator to
 install packages.  When opening up the command prompt you also
 have to select the 'run as administrator' option.'

No windows system here to test, but maybe this is your problem too.

Laura