As I mentioned, I had no problems accessing the new QB website until we changed providers. In both cases, I am using the same computer with Windows 7 and IE.
I checked with dh tonight, and apparently my computer is hard-wired, so a weak wireless router signal would not be the cause of the problem. Now that we have fiber optic, speed is in the neighborhood of 10 mbps.
The QB is the only website I access that has the problem. Sometimes I can use it just fine, but more often than not the QB website will not load at all or, after I have been on it and looked at three or four messages, it stalls and I get the IE "cannot connect with website" message (not exact wording). If I run their diagnostic on why I cannot connect, it cannot determine a reason. It seems that the system stalls waiting for a response from the QB, as I see the "waiting for response from" message at the bottom of the screen, and finally my computer times out on the wait. I haven't timed the wait, but it is at least a minute. Other websites consistently load quickly. This one loads quickly maybe one time out of three, and times out on the other two.
Not sure this is helpful, but maybe it rules out something.....