if you have blank login window problem,
I had both firstly I had it fully displayed and blank
and then just part of it
How to Solve it :
All you have to do is to downgrade your Internet Explorer from 10 to 9 !
First you must uninstall Internet Explorer 10
Start button > in the search box, type programs and features > Enter > left side, click View Installed Updates > scroll down to Microsoft Windows heading to find Windows Internet Explorer 10 > right click > click Uninstall.
You should be back with your previous Internet Explorer (IE) version
, which in this case is IE 9.
To check which version you currently have
, go to C:\Program Files (x86)\Internet Explorer and hold mouse over file " iexplore.exe " and you will see your current version of IE.
and then you have it back , worked like a charm for me