1 person found this helpful
Try installing your updates manually
Updates start here and select product, read to see if you need to install updates in number order, or if the updates are cumulative for the individual product http://www.adobe.com/downloads/updates/
Did that. Same results.
2 people found this helpful
The latest ACR for CS5 is 6.7.1. You can download it here.
What is the installation error? Do you get an error message?