A log file you create after a failed CS5 installation contains a FATAL ERROR such as the following:
FATAL ERROR: Cannot create extract assets at 'C:\Program Files (x86)\Common Files\Adobe\Installers\adobeTemp\{0D067D13-C3D7-4EA6-B346-740CD91FD547}' from zip file 'C:\Users\[user name]\Desktop\Adobe CS5 Design Standard\Adobe CS5\payloads\AdobeBridge4-mul\Assets1_1.zip'
The contents of the source ZIP file referenced in the FATAL ERROR is likely corrupted.

