Internet Explorer may be set to work in offline mode.
Go to File > then check that it says Work Offline. If you are trying the same page all the time it may be that that page is not available, try google or something. You have probably tried that already but its just a pointer.
You could also delete the temporary internet files folder, if you have a corrupt file there it can make things go wrong.
open IE and go to Tools> Internet Options then in the Temporary Internet Files box, select Delete Files then delete all offline content
Its maybe a good idea to delete the cookies too, however you will loose your login username and password data for all websites you login too.
hope that helps