Adrian's computer requires you to learn the hacking skill. Check your messages in Starmaker and you'll see a fan (Ken) wants to meet Anna. Let him meet her. You don't have to do the sharing path but you can. His mom is who teaches you hacking. You also need the Injector from the tech shop in the mall. The computer in the office doesn't have a code but his safe does. The code to the safe is 7172. Someone on Starmaker tells you the code eventually but if you know it you can use it any time.