Well, there's always that force field-esque magic attack, but after they get up they just guard again.
And the right-click after you get a few hits in breaks guard too. But it's annoying to HAVE to always use it.
And you should play it again! In preparation for III of course.
Flourishs bypass guarding, and hit harder. Use 'em when you can.
Otherwise just stand there vulnerable, they'll attack, guard, beat the crap out of them.
Other option being to get better with a bow/crossbow and blow their heads off before they get to you, lol.
Magic is pretty great for bypassing guard (and killing the enemy) as well. Or use the shield, absorb a hit, and go nuts on the unguarding foe.
While I know you mean in case of someone confusing schooling establishment from shooting establishment (many of the same letters) I am still going to read that as lockdown (also known as lock in) for a pub
being drunk in school was either because drunk on playing field or could not be arsed with one particular Thursday afternoon so went and had some beers and played some games instead before returning for an ill advised last lesson/period