The solution may be Operating System dependent. I read your post twice and didn't see it. You could be using a Macintosh for all I know. Try this:
Note: If you're asking for technical help, please be sure to include all your system info, including operating system, model number, and any other specifics related to the problem.
Since we switched from ADSL to cable, whenever there is a DNS failure (whenever we type a URL that doesn't exist, in IE or Firefox), the ''Connect to <ISP-name>'' dialog box appears. This even though cable is of course an always-on connection and there actually is a connection at the time the dialog box appears.
It is as if one of the several 'elements' involved in the connection reports that there is no active connection, instead of reporting that the domain name is unreachable.
Previously (in ADSL or dial-up), we would have seen the usual ''DNS failure'' page in IE. This doesn't happen with our cable connection.
The connection to existing URLs works without problems. The problem is that these ''Connect'' dialog boxes become a nuisance if we have to close them every time we type an 'incorrect' URL.
Is there a solution to this problem?
In advance, thank you for your help.