Aliases and quests will automatically unregister for this event when the quest stops. Active magic effects will automatically unregister when they are removed.

Registering for game time updates is only possible after the player has received full player controls. For the default game the earliest a game time update can be registered is when the player gets their hands freed just inside Helgen Keep (MQ101 stage 240).

Depending heavily on how you use it, using this function could cause your game to freeze under any of the following conditions:

• afInterval is expressed as X / Y where X and Y are both integers (no decimal points) and evaluate to less than 1.
• afInterval is less than some number between 0.0244 and 0.0238. (1.0 / 41.0 and 1.0 / 42.0)
  • Registering for a single update at an incredibly short interval does not appear to freeze the game, so long as it is not reregistered with a short interval within the update event.