A problem already reported is very similar to mine.
I have recently bought a new computer running Windows 8 and Internet Explorer 10.
When I have the map window open, if I attempt to zoom by any method, the window locks, and will not function - except that it can still be dragged about.
I have to close the window then reopen it. It will work ok as long as I do not try to resize the map.
joeksoap