Fix error and download ArcShellExt.dll

ERROR: The application could not start because ArcShellExt.dll was not found.

ERROR: The entry point to the procedure ArcShellExt.dll was not found.

ERROR: dllregisterserver entry point not found - how to fix ArcShellExt.dll

How to register ArcShellExt.dll in Windows

How to unregister a DLL?

Causes of errors in the file ArcShellExt.dll