I recently upgraded my Windows from Vista to Windows 7. On the internet, most websites I use are OK, but there is one website that I log in to regularly that will not open after I enter my name and password. It just reverts back to the sign-in page. If I type incorrect details, it informs me of my incorrect entry. I have an old laptop I use when travelling, with Windows XP, and I can log in to this website with no problems. Can anyone help please?