ShellExecuteEx” is a function of Operating System runs on Windows 10 to execute a particular file for program installation. If the program installer asks for administrative access and the setup fails due to malfunctioned or it is corrupted, then the users find “ShellExecuteEx failed” error on their system. This error alert usually comes with a particular error code. The associating errors codes might be 2, 5, 67, 255, 1155, 8235, 1460, 2147221003 and much more. There are various other reasons those results in the occurrence of this error such as outdated or corrupted drivers, damaged wires and harmful malware etc.