Log of Installation and Activation

Hi!
I know deskroll keeps a log of when computers are accessed but is there any log that deskroll.com would keep regarding when a computer was connected to an account and removed from an account?
I need to prove that deskroll was left on a computer and not removed and then reinstalled later. Of course I do not have access to the computer so I can’t just use event viewer. In fact the computer may not even exist anymore for all I know.
Thank you!