UPDATED: Keyboard strokes not recognized; massive "keyboard lag" spikes

Same here. I have wired keyboard with one of the most advanced anti-ghosting systems (MS Sidewinder x4).

Tried many things, just learned to live with. But would apprieciate if solved.

try to off VSync in options, that help me 100%. Should work :)

i'm having the same problem, just bought a new laptop, and it's really delayed, i had already turned off the VSync but it kind of minorred the problem, i still got some lag on keyboard and also on mouse as well since i'm using a razer naga all my keypad buttons on mouse lag as well, so it's a game problem not a keyboard only... really looking forward to you guys solve this since i'm do want to play HC ASAP and now it's impossible.