Microsoft users are experiencing multiple issues related to the latest security update. An emergency update was released to fix a critical problem causing Windows PCs to potentially fail during a reset. Users are advised to use this out-of-band update instead of the standard KB5063875. Additionally, there is a problem with SSDs disappearing when large files are written, which is under investigation, and users are recommended to delay large file transfers. A third issue involves performance problems, such as severe stuttering and lag, when using Network Device Interface (NDI) for streaming after the August security update. Microsoft is investigating this and suggests users adjust the NDI Receive Mode settings. Users are encouraged to check Microsoft's updated guidance on known issues before proceeding with the update.