Connecting I get all the usual electronic love calls, a "validating user name and password" and then get kicked out with a "error 50 request not supported" sometimes followed by a "error 6 Handle Invalid".
I have checked the modem, swapping it out with a known working number and I know it is not the modem. My ISP is as usual less than helpful with its tech support.
I have a feeling that it may be malware. I recall that just before I got troubles, the machine logged into Microsoft for updates to XP. When it "updated" a whole lot of code flashed - I'd never seen that happen before.
I'm running AVG and until the connection went down it was updated religiously. I've also got Spybot 1.2 and am about to install a later version of this as well as Adaware. I've run all of these tools and come up with nothing.
I'm going to have to drag my box here at some stage - he's got broadband and I can configure a Network connection to you guys but it is likely to take a little time.
Good news is I am not in a hurry. Take your time and thanks in advance.