On Lucy's computer, there is an Email from her to Vidic about him losing his pen easily. You MUST read this email to obtain his pen. While Vidic is staring ta the window behind his desk the message "Press Any Button" will show. Press any button and Desmond will take the pen on the right side of Vidic's waist and sneak it into his left sleeve. Vidic will be too distracted to notice you took his pen. The Pen will allow you to access his computer and the lab top in the conference room.