Windows won't let you delete, move, or rename a file if a program is using it. Frustratingly, it also won't tell you which program is using the file so that you can solve the problem.

2] Delete Locked File Hover over the Content File Locked text, and it will reveal which file is locked. Quit Steam, and kill any component that you see in Task Manager (Ctrl + Shift Esc) Please ...

This tutorial shows you how to permanently or temporarily delete files & folders in Windows using Context Menu, Keyboard shortcuts, CMD, PowerShell, etc.