Running IE11 on two Windows computers -- a 32-bit Windows 7 Professional desktop and a 64-bit Windows 7 notebook. A website which I use frequently has recently made some "improvements". Unfortunately, one of the changes is a popup which asks "Are you sure you want to leave this page" whenever I try to navigate among the pages of that site, or leave the site. In Tools>Internet Options>Privacy, I have enabled Popup Blocker, set it to "High", and made sure that the site in question is not among the allowed popups. This has not changed the popup behavior on either computer. How can that popup be blocked?