FIX: UCRTBASE.DLL Crashes Explorer with error 0xc0000409 on Windows 10/11 (Solved)
If your File Explorer crashes and restarts immediately with error 0xc0000409 due to "ucrtbase.dll" module, continue reading below to fix the problem. Problem description: When you try to browse folders in Windows 10/11, file explorer closes and the following error appears in Event Viewer (Application Event Log):