Ensure you have your 16-digit CC Key (formatted as XXXX-XXXX-XXXX-XXXX ).
The story of a 64-bit install in the early 2000s would have looked like this: The Quest for the Itanium or Opteron magics 2003 64 bit install
Tips
Before starting, ensure you have the necessary credentials and system compatibility: Ensure you have your 16-digit CC Key (formatted