problem installing acrobat 9 pro

[fintrylv]

I've a valid serial no. for Acrobat 9 pro.  When I entered the product serial no., it was processing the installation for several minutes.  When I click finish, it asked me again to enter the product serial no.  I suddenly got a message that the serial no. I entered was invalid.  I'm getting frustrated.  Please help. The product is not installed.

[Rave]

Hi fintrylv,

Please refer the KB Doc : http://helpx.adobe.com/acrobat/kb/error-invalid-serial-number-install. html