Microsoft's Windows 10 update "KB5126256," intended as a licensing preparation package for Extended Security Updates, has caused issues for users, including one Reddit user whose File Explorer crashes when clicking on files due to the automatic activation of the Copilot feature. The crashes were misleadingly attributed to Microsoft Edge, but further investigation revealed they were linked to "mscopilot_proxy.exe" and the module "ShellEh6055x64.dll," associated with the 4t Tray Minimizer application. Users have reported that uninstalling problematic updates can provide temporary relief, while some have chosen to disable updates entirely, despite Windows not offering a complete option to do so.