I don’t know what it is but I turn on sticky keys about once a week. It always happens at the worse time and the effect of being crippled by the sticky key loop is well, crippling. Turning off sticky keys is actually not very straight forward once it is turned on. Hit shift 5 times then window comes up and says to disable sticky keys hit cancel. Easy enough, click cancel. It is still on.

Here is the solution

TO TURN OFF STICKY KEYS HIT BOTH SHIFT KEYS

Just a PSA.