I have cable modem service rated at minimum of 15Mbs. I am using a dlink dir 615 wireless router. My download speeds are at 15Mbs on wireless, but my desktop speeds are only 6mbs. I'm thinking it is a configuration issue.I don't know what setting I should set in XP to achieve these speeds. My laptop uses Windows 7. I have searched for programs that could be causing the slowdown, but haven't been able to ascertain the reason for this.