Ctrl Key Locked On

hi guys! I have worked on a big patch for a month, and now (out of nowhere) I got a strange behavior.
Everytime I run this patch (and only this!), the computer starts to acts like Ctrl key were pressed… like the caps lock, but for ctrl key.
Sometimes even stranger, like every key I press,it repeat 3 time (only and exactely 3 times!)

this is driving my crazy, do you have any ideas?