Present in both 32-bit (System32) and 64-bit (SysWOW64) environments on modern Windows versions. Common Issues & Errors
Corruption is a common cause.
A: Perform a system reset (Settings > Recovery > Reset this PC) keeping your personal files, or use the Media Creation Tool to perform an in-place upgrade. api-ms-win-appmodel-unlock-l1-1-0.dll
= Extended/Unlocked AppModel capabilities (UWP app identity, sandbox configuration, lifecycle management for desktop apps bridging to UWP). Not a real DLL — part of Windows’ API redirection system. Present in both 32-bit (System32) and 64-bit (SysWOW64)