Ive managed to root my H8 galaxy on win 7 rtm x64 very easily using this guide. http://www.androidworld.it/wiki/Root_Samsung_Galaxy_(ENG) all i did was whilst installing the driver from the sdk was to pick the adb test interface rather than peeing about trying to edit inf files etc. then i copied those files in the folder like the guide says and put update zip on the sd card and opened a cmd window in the sdk tools folder with shift right click and typed the commands from the guide and it worked. by far the best guide for a numpty like me who struggles to dress himself in the morning, let alone rooting gadgetry! hope it helps someone!