Right I'm having the same trouble. Now I have recently (two days) done a completely clean install of XP Pro SP2, I've installed all of the updates (a cautionary matter) and everything was fine. I have since installed CA Antivirus, Spybot S&D, Windows Live Messenger, IE7, Firefox, MS Office, uTorrent, Paintshop Pro XI and Age of Empires. I've recorded all of the changes that have been made and which websites have been visited (I'm not the only user). There have been no malicious installs or changes made to the machine that I have been able to isolate. The antivirus hasn't picked up anything and Spybot also hasn't and the Spybot resident hasn't picked up any malicious registry changes.

I also forgot to say that sometimes when I type in an address it changes said address to http:/// and displays "This page cannot be displayed." The wierd thing is that it does that almost instantly. As if it's not even trying to connect to the site itself.

This has only been a recent problem though. The PC has been fine for years before this. With practically the same software installed. Changing browsers makes no difference, if it's happening in IE then FF won't even load anything.

Sorry for the triple post. The second was because I forgot, the third was because the return key was prematurely pressed.