Microsoft has confirmed that a recent Windows 11 update, version 24H2, is causing problems for users of certain Ubisoft games, including Assassin’s Creed Valhalla and Star Wars Outlaws. The company has temporarily blocked the update for devices running these games, citing issues such as unresponsiveness and black screens during gameplay. Players are advised to avoid updating to version 24H2 if possible, although Ubisoft has released an update addressing similar issues with Star Wars Outlaws. A fix timeline was not provided by Microsoft.
Source: https://www.ign.com/articles/microsoft-confirms-windows-11-update-kills-star-wars-outlaws-assassins-creed-valhalla-and-other-ubisoft-games