Tell the forum what OS CD and License you are using for the basis or requirement of this upgrade version.
So I just finished building my first computer. I am trying to install windows 7 ultimate 64 bit as the first OS and it keeps saying the cd key is invalid. I am a student currently and on the CD it says 64-bit x64 upgrade: PRE EXISTING OS LICENSE REQUIRED. I am wondering if this is the reason it will not work. Since this is planned to be my first OS, does it make a difference or do I need to go and buy and old OS just to install that first? Please help!!! thanks!