Error: Error 1324: The folder path 'Reference Systems' contains an invalid character
The following error is returned when attempting to install ArcGIS:
"Error 1324: The folder path 'Reference Systems' contains an invalid character"
The user login (or profile) is corrupt.
Solution or Workaround
Make sure that you are installing the software to a local hard drive, not a network or floppy drive.
Make sure that your user profile (login name) does not contain any special characters including, but not limited to /, -, or *. If it does, then you will need to run the installation under a different user account that has administrative rights but does not have special characters in the user profile name.