This error message is generated by the DRM system failing to locate the digital signature on the CD-Rom. There are several causes of this:
1) The Original CD-Rom is not in the machine.
2) If you have more than one CD-Rom drive, try running the disk from each one.
3) Disable any virtual drives or CD emulation software.
4) Try running the software in 'Compatibility Mode'. See here for instructions on Compatibility mode.
5) Get the latest firmware for the CD-Rom drive. Firmware is the software that runs inside a piece of equipment. It essentially tells it what it is and how to behave. Firmware updates, if any, will be available from the CD-Rom manufactures website. Use dxdiag to find the exact model number of a CD-Rom drive.
6) Check our website, it may be that a compatibility patch ahs already been created.
7) SafeMode 'Fix' - DRM problems have been fixed by carrying out the following procedure:
• Boot into Safe Mode - Press F8 during bootup and then select Safe Mode form the on screen menu.
• Try and run our software. The software may still fail at this point.
• Restart Windows normally and try running the software again.