A recent functional update for Windows 11, labeled KB5124010, is now available through Windows Update. This update includes several improvements, particularly for the File Explorer and the Copilot key. Microsoft has been offering this optional update since September 22, aimed at users who want to test new features before they are officially released with the Patch Tuesday update on October 14. Users can install the update by navigating to Windows Update > Advanced options > Optional updates. The update has drawn attention in recent months, especially following the K2 initiative, which is part of Microsoft's broader efforts to enhance system performance, streamline native components, reduce AI dependency, and improve overall user experience. Among these efforts, Microsoft has hinted at reassigning the Copilot key, a physical button found on many modern laptops and desktops, especially those labeled Copilot+ and powered by Snapdragon chips. Currently, the Copilot key can either launch the Copilot AI assistant, open an application, or trigger a search. With this update, two new options are now available: opening a context menu or acting as a right Ctrl key. This is a welcome change, as the Copilot key often replaces the right Ctrl key, which can disrupt keyboard use. Future updates may add a "Do nothing" option, and there is hope for even more customization, such as assigning macros or multiple actions to the key. In addition to the Copilot key enhancements, the update includes several other improvements. One major change is the return of document previews in the File Explorer Preview panel, which had been disabled due to an issue with the NTLM authentication protocol. The preview is now available for all non-HTML documents. Explorer also receives additional updates, such as the ability to remember the state of sections in the Home tab, improved thumbnails for cloud-stored files, a reorganized Details view, and a fix for a bug that caused the address bar content to disappear when edited. Other notable additions include support for Emoji 17.0, a fix for a wallpaper issue that sometimes resulted in a black background, support for panoramic photos as multi-monitor wallpapers, and a new setting that allows all applications to launch in a maximized window. Additionally, there have been significant improvements in Bluetooth reliability, with numerous issues addressed. However, users should be aware that not all features may be immediately available after installing the update, as Microsoft often rolls out improvements gradually. This can be inconvenient, especially for users testing new features in controlled environments, as some updates might take several days to fully deploy.