This issue has gotten worse since last patch it seems. Randomly or after hitting keys quickly in combat or so, I lose keyboard controls it seems roll dodge(Bound to A) is only thing that works. Some times weapon swap(Bound to W) works, mouse works fine. I mash keys until suddenly regain control.
After last patch its same but I have been unable to regain control with out relogging. With roll dodge, weapon swap, and mouse only working. Some times its a little frequent 20min or so other times not so much.
Wife has similar rig w/ same keyboard+mouse *with out* this problem. Drivers etc should be up to date. I remaped most of my key binds. Also had issue with and with out addons. Happens very random though I could be questing and combat no prob for an hour then stop in town run strait try to strafe then keys freeze up.
Also Wife and I Love ESO, its damn awesome not may problems aside of few known quest bugs but no big deal.