missing visa adaptor?

I've got a working installation of NI-VISA 15.0.1 running on Windows 10 (64 bit) and am trying to create visa objects with MATLAB R2013b and the instrument control toolbox. When I try and create a visa object I get:

Unable to create VISA object.  The required drivers may not be installed properly.
Type 'instrhelp visa' for more information.

When I type: instrhwinfo('visa') I get:

InstalledAdaptors: {1x0 cell}
JarFileVersion: 'Version 3.4'

Clearly the problem is that I don't have any "Installed Adaptors". But I can't seem to find any info on how you install adaptors apart from just installing Visa. Any ideas on what I'm missing? Thanks

[Walter Roberson]

R2013b is not expected to work with WIndows 10.