I can't seem to modify the security settings for IE. Specifically I am trying to log in to my Yahoo e-mail account and I get a message saying "The browser you're using refuses to sign in (cookies rejected)". The privacy report says that, indeed, several versions of the yahoo web-site have cookies blocked even though right clicking on the sites clearly shows that "Always Accept cookies from this site" is selected. I can see nothing wrong with the cookie settings and have cleared caches, temp files etc as suggested by many other solutions out there. Internet search suggests that there should be a P3P entry in the registry but I can't see it anywhere. Where would these records be? I've run Ad-Aware and SpyBot with no improvement.
The PC is running Ranger, a schools based OS but I've removed it with no difference.
XP Windows Pro SP2, IE 6.
Any thoughts gratefully received.