Hi Idi
Thanks for the information.
Since release of windows 8.1 preview I am using HANA Studio and Client on it. Earlier I was on windows 8.
Everything works perfect with java jdk-7u21-windows-x64 on windows 8.1
Give it a try.
To be on safer side first I tested everything on Virtual Installation of Win 8.1 using vmware.
You can move ahead with windows 8.
Regards
Kumar.