Hi I am trying to install FFXIV onto a PC but it keeps coming up with the following error while installing from the DVD:

CRC error. The file I:\SquareEnix\FINAL FANTASY XIV\data\5B\20\00\00.DAT doesn't match the file in the setup's .cab file. The medium from which you are running the setup may be corrupted contact your software vendor.
At first I thought it was a problem with my disc so I borrowed my friends copy and I still get the same error while trying to install.

Any idea whats wrong here and how to fix it so I can get this installed?