Don't know if this is relevant anymore. 

I am using Windows 7.

I had the same problem with windows automatically installing IE 11.  To remove the install of IE 11, you can go to the control panel / programs and Features /  then on the left side of the screen you will see a "View installed updates" , click on that and you will now see all the Microsoft Windows updates installed, not the programs.  It takes a while for all the updates to appear, so be patient.  Scroll down and Under Microsoft Windows updates, you should the update for IE 11.  You can uninstall it and it will roll back to IE 10.  After IE 10 is restored, open IE 10 and click the "Help" menu and then "about Internet Explorer 10".  You will see a button for "Install new versions automatically".  Uncheck it so it won't update to IE 11 again.  This will eliminate the need for you to restore your computer to an earlier date and losing any data associated with it.

Doing this was able to restore my library in poser.

Hope this helped somebody.

Cheers,

Davo