Under Windows 7 the program files directory has extra protection, to prevent accidental deletions and changes that may effect the system.
To get past this, As an admin user right click on the sub-folder that contains your files (C:\program Files\Adobe ??), and right click and select properties, in the dialogue box select security then advanced
Select the Owner tab and then click edit, Select your user name from the list presented and press ok to action - you should get a message stating you have taken ownership.
Back in the Advanced box - on the permissions tab if your username is visible double click this and click on full permissions and ok out of the dialogue if your name is not visible select change permissions and add your username to the list and set the full control permission
This should now allow you to run the program