Alternately, try using other non-IE applications that connect to the Internet.
If both ping/tracert succeed, then I would start to suspect a DNS problem – try using an IP address (instead of a hostname) in the URL (ex. http://184.108.40.206 ). Use "ipconfig/all" to identify the DNS host and make sure you can resolve host names (ex. "nslookup antwrp.gsfc.nasa.gov").
If they fail, then you have a modem problem at some level. I would expect that the "ipconfig" would show that explicitly.
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