Microsoft released an optional non-security update for Windows 11, identified as KB5079391, which caused significant installation issues for users, marked by error code 0x80073712. In response, Microsoft issued an emergency update, KB5086672, to address these problems for affected Windows 11 systems, including versions 25H2 and 24H2. This new update supersedes previous updates and includes protections and improvements from the March 2026 Windows security and non-security preview updates, along with an installation fix. The update also offers enhancements such as refresh rates exceeding 1000 Hz, improved auto-rotation and HDR reliability, and enhanced power efficiency for USB 4-connected monitors during sleep. Earlier in the year, the January security update, KB5074109, caused issues for gamers with Nvidia GPUs, leading to frame rate drops and system instability, with some users experiencing boot failures and errors like “UNMOUNTABLEBOOTVOLUME.” Additionally, users reported problems with shutting down or hibernating their PCs and disruptions in cloud-based applications like Outlook, OneDrive, and Dropbox.