I am running IE 11 on Windows 7. After booting up the computer, I can open IE once or twice (by closing and opening it again). But if I try and close and open the program a third time (or sometimes the second time), IE opens but won't load a page. Furthermore, and very strangely, once this happens, I also can't open Chrome or Firefox - Chrome load also with a blank page and Firefox won't open at all. It is as if IE has taken control of Internet access but is frozen, and the only solution to get a browser working again at that point is to restart the computer. Ghis just started happening a couple of days ago.
Outlook does seem to continue to work - it is just the browsers that are frozen.
I have already tried deselecting IE 11 from the Windows list of program that you can get to from the Programs and Features control panel, restarting, then reselecting it and restarting again. I also tried resetting the IE settings form the Internet Options control panel. What I have not yet tried is completely uninstalling and then reinstalling IE.
I have Norton, and it has not found a virus, but maybe there is a corrupted file?