reg add "HKCU\Software\Microsoft\Internet Explorer\VersionManager" /v DownloadVersionList /t REG_DWORD /d 0 /f
del “%LOCALAPPDATA%\Microsoft\Internet Explorer\VersionManager\versionlist.xml”
Il secondo passaggio conviene farlo partendo da “%LOCALAPPDATA%
Altri workaround
http://blogs.msdn.com/b/ie/archive/2014/08/06/internet-explorer-begins-blocking-out-of-date-activex-controls.aspx