Hands Off!
There’s quite a bit to unpack from this story, so allow us to break it down. First, the OP’s brother asked her to fix his laptop since it couldn’t connect to the campus Wi-Fi. She couldn’t find a solution, so she headed down to the IT department, but everyone was on break. Everyone except a work study, which basically means he knows nothing about nothing.
Long story short, he has no idea what the problem is, but the real issue is that he actually reached over and laid hands on the OP to show her how a “quicker way” to unlock her phone. How this guy has no idea about personal space is beyond us.