Photoshop CS4 Trial version install error

Hello. I've downloaded the trial version of Photoshop CS4 Extended.

When I click the setup.exe it starts running and works until it reaches the loading setup menu.

Then a error pops up.

The title of the message box is "Windows Internet Explorer" and the message is "Critical errors were found in setup." And it also said to look in the setup log.

The log file contained this message " FATAL
Critical errors were found in setup
TypeError:'undefined' is null or not an object"

I'm using XP (SP3) and my computer is well above the minimum requirements.

Does anyone know why this is occurring?

What other software is on your system? What version of Internet Explorer? The error you describe sounds like you never bothered to update IE and thus the proper mechanisms for running and displaying the install screens are not in place. If automatic update does not offer the respective options, I recommend downloading the standalone installer for IE7 (or even the IE8 Beta) as well as double-checking whether your .NET runtime 1.1 is also in place. The latter should only be required on Vista, but even on XP it has the positive sideeffect of fixing a few broken DLL connections/ assignments, so it may be just what you need.

Mylenium