Worked on stability hardening and reliability improvements for the SPI Bus Driver within the microsoft/mu_basecore repository, focusing on embedded systems development and UEFI. Addressed a critical bug by correcting GUID usage in SpiBusDxe and implemented null-checks for memory allocations to prevent crashes during allocation failures. The approach ensured that device identification remained consistent and reduced the risk of misconfiguration during SPI bus initialization. Enhanced error handling and diagnostic logging were introduced, making failures traceable and improving post-release support. The work was carried out using C, leveraging expertise in driver development to deliver a robust and maintainable codebase.