For those of you who, like me, make use of Cygwin and Bash, beware that when you copy a file with cp in a Bash shell rather than copy in a DOS box (Command Prompt), you might find that some programs or services have trouble accessing those files because the user that they’re running as does not have the appropriate (read or write) permissions for the copied file.
The two commands handle ACLs (access control lists) differently.
Therefore, I recommend that when copying such a file on the Bash command line, you consider using the DOS command copy, not a Bash command.
[Cygwin is configurable with respect to ACLs. See for example Cygwin’s setting up documentation.]