Avermedia has newer software out for the SPC300 visualiser. Using this software rather than the old software will alleviate USB errors. If you get an error when trying to connect your visualizer, this software is for you.
I haven’t had a chance to investigate it yet, but the shiny new interface seems to have more options for manipulating images.
DISCONNECT THE USB CORD WHILE INSTALLING THE SOFTWARE.
http://www.avermedia-usa.com/presentation/dl_spc300.asp
