Usually 'Server not found' means there is a problem either with the server or the isp having a problem locationg the server by it's IP addy. I have this problem with one particular server based in the US and have to physically have the servers ip number after the www. but before the main addy in order to connect to it.
That may be so, Jak, and thanks for the feedback, but it can't be the problem solver. It's ridiculous if you have to type in an address just to connect to a browser every time. It's got to be either the ISP (Tiscali) or something in my connection settings.
Clicking on the browser icons then the Tiscali connection window coms up, clikc on it and that message comes up when logged on. Or, when logged on, try to go to a page and the message comes up. It's not just in one browser, but all of them.