Hi,
Please make sure there is no external drives attached to the machine in which you might have ADOBE CREATIVE SUITE 3 as a backup.
If not, then please follow the below steps and manually remove the related folders : ( DO THIS ONLY IF YOU DON'T HAVE ANY OTHER VERSION OF ADOBE PRODUCTS ON YOUR MACHINE )
{ Delete the folders with " * " sign on it }
C:\Program Files\Adobe*
C:\Program Files\Common Files\Adobe*
C:\Program Files\Common Files\Macrovision Shared
C:\Program Files (x86)\Adobe*
C:\Program Files (x86)\Common Files\Adobe*
C:\Program Files (x86)\Common Files\Macrovision Shared
C:\ProgramData\Adobe*
C:\ProgramData\FLEXnet
C:\Users\<user_name>\AppData\Roaming\Adobe*
C:\Users\<user_name>\AppData\Roaming\com.adobe.*
C:\Users\<user_name>\AppData\Local\Adobe*
C:\Users\<user_name>\AppData\LocalLow\Adobe*
C:\Users\<user_name>\AppData\Local\VirtualStore\Program Files\Common Files\Adobe*
*** if you don't see some of these folders or files skip that step.
Regards,
Bani