There are Applications & there are Services. PIM is an application that takes advantage of the TPM to securely hide the keys in hardware. The Services enable you to attest that a TPM is real & allow you to manage the lifecycle of that TPM. Activation rates relate to the takeup of Services Not the use of the bundled Applications. The only difference between the current retail ETS software suite offerings,Pro & Business,is Pro includes PIM software & Business does not.......the difference in price for these CD's is $10........