You may encounter an issue using FTP directly from Windows due to the format of the FTP username which contains the @ symbol also used in the full FTP address in Windows of the format ftp://username:password@site/.
As cPanel FTP usernames also contain an @ this can make the connection fail, an alternative is to substitute the @ with a +, so a username such as test@nethosted.co.uk would become test+nethosted.co.uk.
