This kind of Issue has been reported before also of Windows 8 with ISE 1.2. Cisco BU has been communicated with this issue. Trying to find a solution for this.

Hello,For your information ISE 1.2 is available now with SNS 3415 AND 3495 Appliances.

Hello,Were you able to resolve this issue? If yes, could you please tell us what did you do? Actually I wanted to know whether you were able to resolve this by restarting the device or what?

Hello,Could you please elaborate your question further?