How do you counter on assassins creed 2 PC?

Oh, dude, countering in Assassin's Creed 2 on PC is like a walk in the park... if that park is full of angry guards trying to stab you. Just press the right mouse button at the right time when an enemy attacks, and Ezio will counter like a pro. It's all about timing, reflexes, and not getting too distracted by all the Renaissance architecture around you. Good luck, my friend!