You do what you would do if you lost your wallet. Cancel everything and start fresh. The damage is already done and nothing your doing to do about it at this point. Cancel it all, tell everyone and move on.
Unless you want the laptop back... I presume if you have something to worry about in your identity then you won't get the laptop back. However, knowing you can get to the systems etc... I think your fine either way. I would have wiped the systems after gathering the information and putting the image on a separate disk.
You do what you would do if you lost your wallet. Cancel everything and start fresh. The damage is already done and nothing your doing to do about it at this point. Cancel it all, tell everyone and move on. Unless you want the laptop back... I presume if you have something to worry about in your identity then you won't get the laptop back. However, knowing you can get to the systems etc... I think your fine either way. I would have wiped the systems after gathering the information and putting the image on a separate disk.