3.1.4.1.25 Nonprintable Characters
The Web Services Management Protocol Extensions for Windows Vista service SHOULD NOT include the Unicode characters ranging from hexadecimal values 0x1 to 0x1F (inclusive) in a response message, with the exception of the three characters below:
0x9 (tab character)
0xA (newline character)
0xD (carriage return character)
The Web Services Management Protocol Extensions for Windows Vista service SHOULD return the question mark character "?" in place of any of the above restricted characters.