I have a recent installation of Windows 7 Professional SP-1, which includes IE8. I am unable to install IE10 or IE11. The installation appears to start out OK, including downloading and installing required updates, and downloading and installing the browser itself. But In both cases, after "Restarting Programs", there is a message that installation did not complete. A link appears on the desktop to an Internet Explorer Troubleshooter, but all it says is that my version is outdated, and I need to update it. I do not find IE8 among the applications in Control Panel>Programs and Features or installed updates, so I can't remove it.