I am unable to load certain pages, particularly PC magazine pages. Whenever I try to load, at the bottom right of the taskbar it says `Looking up. ad.uk.doubleclick.net`. The green progress bar gets to about 90% complete and everything stops. I have tried to reload the page but just get to the same place. At the moment I am using an old steam driven PC which allows me access to the sites. The PC I have trouble with runs Windows XP home media edition 2005 and the browser is Firefox. Has anyone else had this problem and if so how did you solve it?