Failure to install Adobe Photoshop CS3

Hi All,
I got the Photoshop CS3 downloaded on my laptop and am having a hard time installing it. The setup simply halts with a message that says an error has occurred and it offers no helpful hint as to what might be the problem. It simply says encountered an error and that is all it has to say. I have been trying to install several times now and unfailingly coming across this cryptic error message every time. I tried running a complete scan of my system using AVG and it did not report any issues. I am using windows XP on my laptop. As far as I know I have installed all the updates and all the software available are up to date. And I ensured that my system meets all the recommended system requirements for installation. What could be the error that is encountered? Please can someone help me? Thank you for your immense help.

Setup has encountered an error and cannot continue. Contact Adobe Customer Support for assistance. The requested operation is successful. Changes will not be effective unit the system is rebooted.
