Replaced 2 Hauppauge Nova S+ tuners which were mostly reliable, very occasional missed recording due to "tuner was not present at time of recording" so MC7 history stated.
Upgraded to TBS6984 tuner, card ran reliably for first month then started missing scheduled recordings, during which time I reinstalled graphics/sound card HDMI drivers, reset up tuner rescanned satellite, all gave only temporary fixes. Found MC required reboot to enable tuners to be available but soon became unavailable again during playback session with scheduled recording in back ground or S3 wake to record failed due to "tuner was not present at time of recording" Windows devise manager indicated TSB6984 present and working properly.
Reinstalled W7 64bit OS, TSB6984 failed as above from outset "Service unavailable [WMC] Removed TSB6984 reinstalled Hauppauge tuners no issues since. Hoping for a software fix but have not found one as yet.
Thanks in advance for any assistance offered to help fix this problem.