Man, the ZWT emulator is Crappy. It won't activate anything without failing 6-7 times. Try KMSpico/LaNANO instead. They both do a real great job at activating Windows 8/MS Office 2013 and almost anything that uses KMS. And if you really want to use it, try CODYQX4's Microsoft Toolkit instead. It already has the emulator embedded in it.
Only in win7 but it might work too in win8 I don't have it to test it, Also I see some people here That tell local kms don't work Inside win8 .......ll.ll.
It won't work with 8. When office is installed on 7 it will use it's own activation and the 2010 way still works. When it's installed on win8 it uses win8's activation system and kms has changed for 8. So Win8 and Office 2013 on Win8 cannot be activated using the ZWT emulator.