hope this isn't too obvious, but limewire is obviously going to choke your bandwith while it's running, so if you are running limewire and playing call of duty online, your ping will seriously suffer, even if you aren't downloading anything. when you close out of limewire, it's not really closed, but running in the background, and still chocking bandwith. the only way to really close it is to ctrl-alt-delete and and close out the limewire.exe in processes. then your bandwith will go back to normal...