Internet Explorer 11 Opens with blank page and settings grayed out

In my particular case, it seemed to be a corrupted Internet Explorer profile, and I was able to fix it by opening REGEDIT.

I deleted the key

[HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer].

Then, logging off and back on; upon logging back on, I opened the Internet Explorer and everything came back to work normally.

Of course, as a safeguard, I recommend to Export the key for backup before completely getting rid of it.

Answer found at:

http://answers.microsoft.com/en-us/ie/forum/ie11-iewindows8_1/internet-explorer-11-blank-page-settings-grayed/8472b3a2-91a2-42c8-be1d-686d8a7c1f80