Rather than using the disk, try downloading instead.
CS6 - http://helpx.adobe.com/x-productkb/policy-pricing/cs6-product-downloads.html
As far as having inaccessiblke activations go, you should contact Adobe support using chat and they can take care of the deactivation.
Serial number and activation chat support (non-CC)
http://helpx.adobe.com/x-productkb/global/service1.html ( http://adobe.ly/1aYjbSC )
