My computer is awesome, Maple doesn't agree (Lag, not internet lag)

Just tested and NPC Chat key definitely is a little slower, but normal clicking is still slow. The problem is alleviated a little when in Windowed mode, atleast, starting an NPC dialog. But pressing answers, for example in a quiz will result in lag for me.

@XTOTHEL: Didn't help

Edit: Just read on lolbasil that since the maintenance patch last week, almost everyone in Windows 7 x64 is having the same problems as me. They also pointed out another (pressing esc lags).