According to the documentation for CreateProcessW: " If you are using a long file name that contains a space, use quoted strings to indicate where the file name ends and the arguments begin; otherwise, the file name is ambiguous."

However, it looks like the current implementation for starting processes doesn't add the quotes.

As a result, if you try to run the program C:\Program Files\foo.exe and there is another file named C:\Program, Windows resolves the path as C:\Program, but since it isn't a valid Win32 program, then we get the error: "CreateProcessW failed 193: %1 is not a valid Win32 application".

Causes: flutter/flutter#19359

cc @zanderso