Changing the date/time on your computer will mess up a whole lot more stuff than just EoFF browsing habits. It's not a good idea unless it's really necessary. For example if you set your clock back, you'll likely have files on your computer that your computer thinks were created in the future. If you set it ahead, things that were supposed to happen at X time will never happen because X time never occurred. I guess I don't know how huge an issue it is in Windows, but in general it can cause a mess.