First of all, renewing the IP address does not necessarily help you get stronger connection. You wanna make yourself clear on that. Secondly, as the guys suggested above, ipconfig release and repair ONLY works for the Private IPs, meaning 192.168.*.* or in some cases 10.1.*.* -- and that ain't helping you much. Comcast must have provided you with the Dynamic IP address, which can be changed if you turn the modem (not The ROUTER) 'OFF' , and let it stay at least half hour. That will flush the DNS and your current IP, and the ISPs router will most likely generate a new PUBLIC IP for you~~ According to your description, your DNS isn't doing its job. Go to command prompt and type "ping yahoo.com" -- You might not get any response --Now try "66.94.234.13" ; if that sends you an ACK (acknowledgement with 4 lines of replies), you know your DNS needs reconfigured. In most cases, renewing the PUBLIC IP takes care of that. Good Luck ~@~