What causes Scheduled Task error 2147942402?

As Ryan Ries pointed out, 2147942402 translates to "File not Found" - which is a very appropriate response. Try and press Win+R, put in "move" and press enter - that's the interactive equivalent of what your task is failing to do.

The reason is that MOVE is not a program, but a native command in cmd.

It should be:

Program: "cmd.exe"
Arguments: "/c move C:\Windows\Temp\*.foo E:\Foo_blah_blah_blah_blah\Foo2\"