Paios and Phelos require several drivers to be installed. The Characterization Suite Base-Installer installs all of these drivers. In case this fails, you can download the drivers on this page and install them manually.
Download Pickering-Driver (pi620_32.dll)
Download PicoScope-Driver (ps5000a.dll)
Download Arduino Driver
Download Spectrometer Driver (Avasoft)
Download LabJack Driver (labjackud.dll)