I'm very sorry for simultaneously using LAV and ffdshow but it is necessary thing in my practice so far. Everything was OK up to 14.1.3 KLCP version, so ffdshow and LAV peacefully coexisted under Win10 not interfering each other. But after updating to 14.1.5 version ffdshow forced out LAV in MPC-HC at all. Fortunately under Win7 the peaceful coexistance goes on. So I had to leave KLCP 14.1.3 on the Win10 machine and use 14.1.5 under Win7 only.