What should I do if I am receiving an error message during the installation?

This issue is usually the result of the Microsoft Installer being of an old version. You can try to update it using the instructions here:

http://consumer.installshield.com/kb.asp?id=Q108340

http://support.microsoft.com/kb/888019

If you do not have the Microsoft Installer on your computer at all, you can download it from:

http://consumer.installshield.com/kb.asp?id=Q108201