I was introduced to computers in a cyber cafe circa 2003. I saw that it was extremely difficult for cyber cafe admins to check the status of computers, and to lock/shut down.
I made a client-server application for remote control and monitoring of computers. While it was designed for a LAN, it could work over WAN using port forwarding.
This was my first student project but it was robust, and the institute had me install it on their computers for their use. I won the first prize in the state-level tech fest, which boosted my confidence.