After you install either of the following security updates, when you remove an iframe element that contains a PDF object on Document Object Model (DOM) in Internet Explorer 11, PDF viewer freezes and the whole browser content page gets blank.
On Windows 7 Service Pack 1 (SP1), Windows Server 2008 R2 SP1:
October 2016 security monthly quality rollup for Windows 7 SP1 and Windows Server 2008 R2 SP1 (KB3185330)
On Windows 8.1, or Windows Server 2012 R2:
October 2016 security monthly quality rollup for Windows 8.1 and Windows Server 2012 R2 (KB3185331)
On Windows 7 Service Pack 1 (SP1), Windows Server 2008 R2 SP1:
October 2016 security monthly quality rollup for Windows 7 SP1 and Windows Server 2008 R2 SP1 (KB3185330)
On Windows 8.1, or Windows Server 2012 R2:
October 2016 security monthly quality rollup for Windows 8.1 and Windows Server 2012 R2 (KB3185331)