A shutdown bug in Windows 11 has been confirmed, with some outlets blaming update KB5073455, while others point to a chain of bad updates or specifically update KB5074109, which is also linked to boot failures and other issues. Update KB5074109 has been associated with various problems, including affecting Nvidia gaming performance and stability, as well as support for older modems. The situation with Windows 11 updates and their effects is unclear, with some reports of positive changes, such as improved gaming performance compared to Windows 10.