|What was the error message?|
Command Prompt can be used to copy a folder if for some reason you need to use it, press Windows Key + R and type cmd.exe in the Run box - hit Enter key.
EDIT: In Command Prompt (which is a DOS emulator) type copy /? and it will give you the various switches that go with it - some commands differ slightly from true old style DOS but work in much the same way.
Your question is not fully explained hence the above is all I can suggest.
Always pop back and let us know the outcome - thanks
message edited by Derek