The paltry 1.04 MB download allows owners of the Crytek-developed PC shooter to deactivate their installation of the game, freeing up one of its five activation slots.

As with the Spore deauthorization tool, launching a de-authorized install will prompt a re-authorization, and Vista users are advised to turn off UAC (User Account Control).

Thanks to spaceyme and acare84 for the heads up.