So it's telling you what to do in that function. In stead of using
copyfile(source,dest);
you have to use
copyfile(source,dest,'f');
to force the copy. If that doesn't work, then the issue is that matab doesn't have the right permissions and you'll have to open matlab as admin.
If that still doesn't work, I imagine windows can't copy there either and it's a great lock that windows is placing on that location - there's nothign (reasonable) that can be done about it from matlab.
