Worked on the ValveSoftware/Proton project to deliver a targeted feature addressing startup latency by preventing the execution of GamingRepair.exe. This was achieved through a registry-based mechanism using the Windows API, where a specific registry flag was set to indicate successful handling and bypass unnecessary process launches. The solution was implemented in C and focused on system programming concepts, ensuring minimal risk and clear traceability with a single, well-scoped commit. By integrating directly with Windows platform internals, the work improved user experience for Proton users by reducing time-to-launch, demonstrating careful attention to both technical detail and user-facing performance outcomes.