I was using custom MadVR settings that work fine for 1080P MKV but not JRiver live TV.
New Win10 LTSC builds, freshly formattted and all.
Three different PC's. Two are 1st gen I5 and one is 9th gen I5.
I have not installed any 3rd party antivirus yet.
I already uninstalled WMC on one of them.
It was not installed on the other two, as they were "N" versions of Win10.
Channel 7 is behaving weird.
Sometimes I get "waiting for lock" when clickin on 7.1.
But if I start at channel 6 and use the channel-up button, then 7.1 plays fine.
If I do a channel refresh, then sometimes it doesn't find anything below channel 18.
Which there are like ten channels under 18 and all come in at high strength.
My tuner is HDHomeRun. This one.
On a 1Gb LAN.
https://sm.pcmag.com/t/pcmag/review/e/elgato-hdhomerun/elgato-hdhomerun_fzzw.1280.jpg