Controller lag on certain versions of windows?

[csharp34]

Hey guys. First off I wanted to say that I really appreciate this emulator. Since it runs some of my favorite games far better than the original psp did, there's alot more depth to them now. This emulator is incredible.

My question is, on my regular pc running windows 7 using input mapper, the emu works great with no controller lag.

But I try to play the same game on a different machine using input mapper, and there's a small bit of controller lag. Its very noticeable, probably 1 full secondish.

I dont think it's a spec problem because the 2nd machine is more powerful than the first, cpu,gfx card and ramwise. Only the 2nd machine is running windows 10, instead of windows 7. I've tried turning off it's native game record thing and the lag still exists. Made sure vsync was off, etc.

Any ideas? Can't figure out what would change. thanks for the help