Serviio

I have an issue whereby when playing a video from my WDTV via my main PC it drops out.
Connected via network cable and not Wifi.
What to do?

Not certain what you mean by drop out. Does playback just stop, and you are returned to the main playback screen, or is Serviio no longer visible from your player? If I am understanding what you're using (the WDTV), that is an extremely old device and it might simply be failing.