I contaced the protexis support and i think they could really helped me.
i got a patch for the protexis licensing service.
i have deinstalled windvd 2010 and the protexis licensing service. i installed it again, installed all patches until service pack 4 for windvd and then i installed the protexis patch. it worked for me.
it's worth a try
btw: i burned the setup file of windvd on a cd and installed it from cd. corel support said this solved many known problems protexis licensing service patch:http://4us.to/download.php?id=DDB18FFD3