Ultimately, no, Windows isn't interfering.
More likely it is a driver problem with the "USB wigit".
Firstly does the wigit show up in
Google search for the relevant kernel module, and see if it is being loaded by
#lsmod | grep $modulename
It is possible that the drivers for the "wigit" dont come stock with Ubuntu. And you may have to find linux drivers online, if they are available.
(As a side note, hard wiring via a cat5 should give you an internet connection to get the drivers installed)