Hello,
I have Few Questions here.
Are these SEP on the Laptops installed as Managed Clients?
Do you want to block the users of the Laptop from printing OR using a Personal Printer?
Would this Personal Printer be a specific Printer or Any Personal Printer?
You could block using Printers via Application and Device Control of Symantec Endpoint Protection (incase, if the Clients are managed)
You can also block Print Screen with the help of Application and Device Control.
https://www-secure.symantec.com/connect/forums/how-block-print-screen-application-device-contrl
You can also do this via Microsoft GPO
http://technet.microsoft.com/en-us/library/cc782270(WS.10).aspx
http://social.technet.microsoft.com/Forums/pl-PL/winserverGP/thread/3965d1fc-0fdb-4f88-acea-405baa9dbaa8