We currently support Windows XP and Windows 7.

It is possible to install Zbrain SDK 2013 and 2015 on Windows 8 and 8.1.
LabVIEW 2011 is not supported by NI for Windows 8 see here for compatibility of NI Software and Windows 8

Before you run the installation you have to disable the signature verification as described on the sites linked below:

Disable driver signature verification on Windows 8.1

Disable driver signature verification on Windows 8.