Pass the Hash on Windows 8.1

In this case there still is an issue that should really be addressed, but that will be why it probably isn't ranked high on the to-address list

Here is a Tweet from Mark Russinovich to this topic! I asked him bout that!

Ostensibly, the vulnerability is necessary to maintain functionality. Something to do with the particular Kerberos implementation and backwards compatibility. They've made it more difficult to get to the point where you can attack, however.