Microsoft will introduce a new 'Preview Anyway' button in Windows 11 File Explorer to address the issue of download files being unable to be previewed due to previous security restrictions. Previously, to prevent security risks such as NTLM hash leakage, Microsoft disabled the preview function for files with a 'Network Mark' by default, requiring users to manually unlock them or adjust settings via properties to enable previews. The new button allows users to bypass warnings and preview content directly when they trust the file source, balancing security and convenience. This feature is expected to roll out in the coming weeks.