I had the same problem and did everything you stated to no avail. However, the only thing I didn't do was to unplug the modem. So I shut down my laptop, unplugged the modem for several minutes, plugged modem back in, restarted and viola! Amazon dilemma resolved! Update - After several days of trouble-free shopping on Amazon, the problem reoccured. I'm not technically savvy, but following the OP's advice, rebooting the modem once again (in my case) resolved the issue, at least temporarily. I've also experienced similar scenarios on other secure web sites (i.e. banking), but rebooting the modem always gets me back in. It appears to be problematic on HughesNet's end.
... View more