Tuner no longer avaliable

Hello good afternoon friends, I have a big problem and I need help from you, So I’m using Kodi 17 Alpha 3 and Nextpvr 3.8.3 as backend on the same machine with Windows 8.1, everything works perfectly just that sometimes the transmission for nothing and the message “Tuner in avalable longer” and the channels of exchanges sometimes also occurs this error, I was analyzing my task manager at the time that occurs this error and realized that ffmpeg for work that moment, I think that’s why the Buffering is 0%, I thank you, and excuse me for bad English, after all I am Brazilian.