De acordo com o Adobe KB:
This issue may occur when one of the following conditions are true:
* The Adobe Creative Suite 4 installer cannot launch the user interface for the installer.
* A third-party component is preventing our installer's user interface from launching.
* You are using Windows XP in Normal mode.
* The Windows Installer Service that is included with Windows XP is unregistered or damaged.
Recursos:
O instalador congela durante a verificação do perfil do sistema | CS4