I am using windows 7 64bit, something s to make sure of
Create a folder in the c drive for aurora and place all the files in that, there is no setup files you need to change or anything like that.
Make sure UAC is off and you are an administrator of your PC, they will make sure there is no conflicts. Also make sure you have downloaded all the needs install files, my first attempt I did not read the install documents thoroughly and missed a couple of vital steps including copying various folders from the zip file into the directory.
Try this.