I have the same exact problem. After upgrading from Windows 7 to Windows 10, SVP is essentially stuck in Pause and doesn't play the video in MPC. Never had a single problem with any setting in Win 7.
In windows 10, MPC works fine on its own, but SVP will not play video. I can hear the audio but video is frozen, and eventually MPC crashes. Tried reinstalling SVP and MPC etc. Also tried resetting profiles.
I guess I'll just try to update to SVP 4 like the OP did.
Win10 x64, GTX 970, i7, mpc-hc