Identify and fix problems with computers arriving for repair. Replace quality parts with crappy parts if you wish.
Fix broken parts and assemble them in a computer. Then put it up for sale and negotiate with customers. Fool them if you can.

Develop viruses and infect computers with the money you earn. Join the robot wars and develop your own robot.

Hack customers computers and find out their bank details. Steal the money and leave no trace behind.

Research mysterious websites and explore extremely dangerous areas.